Best Digital Scale for Resin

Posted by AWS Team on Sep 1st 2026

The best digital scale for resin is one that matches the actual size
of your pours while giving you enough readability to measure resin,
hardener, pigments, and additives consistently.

For many resin artists, makers, and small workshops, a practical
starting point is:

2--5kg capacity x 0.1g readability

For smaller jewelry pours, pigment testing, and lightweight additives, a
second scale in the range of:

100--500g capacity x 0.01g readability

can be useful.

The important point is that resin systems are not all mixed the same
way. Some manufacturers specify ratios by weight, others by
volume, and some provide both. Those ratios are not automatically
interchangeable because Part A and Part B can have different densities.
TotalBoat, for example, publishes product-specific epoxy ratios by
weight and instructs users to follow the weight ratio for the exact
epoxy system when using a digital scale.

That means choosing a good scale is only one part of accurate resin
mixing. You also need to follow the manufacturer's specified ratio and
measurement method.

American Weigh Scales' Pocket Scale vs. Kitchen Scale
guide
specifically notes resin additives and pigments among craft materials
that can benefit from finer measurements. The same principle applies
across resin work: choose enough capacity for the complete cup and
mixture, then choose readability fine enough for the smallest meaningful
component.

Quick Recommendation Table

Resin task Suggested capacity Suggested readability

Tiny pigment tests 100--500g 0.01g
Resin jewelry batches 500g--1kg 0.1g
Coasters and molds 1--3kg 0.1g
Tumblers and medium crafts 2--3kg 0.1g
Tabletop batches 3--5kg+ 0.1g--1g
Larger casting/deep-pour batches 5kg+ 1g or finer as required
Pigments/additives 100--500g 0.01g--0.1g

These are scale-selection ranges, not universal epoxy mixing
instructions. Always use the exact weight or volume ratio specified for
your resin system.

Why a Digital Scale Matters for Resin

Two-part resin systems depend on a defined relationship between resin
and hardener.

When a manufacturer provides a weight ratio, a digital scale allows
you to reproduce that ratio directly.

For example, TotalBoat's current instructions list different weight
ratios for different epoxy systems, including ratios such as 120A:100B
and 100A:45B. This is a useful reminder that there is no universal
resin-to-hardener weight ratio.

The correct ratio comes from the exact product instructions or technical
data sheet.

Weight Ratio vs. Volume Ratio

This distinction is essential.

A product labeled 2:1 by volume does not necessarily use a 2:1 ratio
by weight.

Why?

Because resin and hardener can have different densities.

TotalBoat explicitly warns that weight and volume ratios may differ for
this reason. System Three likewise states that its epoxy products can be
measured according to the correct product ratio and that paste and putty
products are most accurately measured by weight.

Never convert a volume ratio to the same numerical weight ratio unless
the manufacturer specifically says the values are equivalent.

What Capacity Do You Need?

Capacity is the maximum total physical load the scale can support.

If a scale is rated:

3,000g x 0.1g

3,000g is the maximum capacity.

0.1g is the readability.

AWS explains capacity/readability notation in What Does 500g x 0.01g
Mean on a Digital
Scale?.

The Mixing Cup Counts Toward Capacity

Suppose:

Mixing cup = 120g
Resin = 800g
Hardener = 400g

The scale is physically supporting:

120 + 800 + 400 = 1,320g

A 1kg scale is not large enough.

A 2kg scale can support the load.

This remains true even if you tare the cup before adding resin.

Tare Does Not Restore Physical Capacity

Tare changes the displayed value.

It does not remove weight from the load cell.

If a 200g container sits on a 500g scale and you press tare,
approximately 300g of additional physical capacity remains.

This is one of the most common mistakes when choosing a resin scale.

Leave Capacity Headroom

Do not routinely work at the maximum limit.

Headroom gives you room for:

Heavier mixing cups
Slightly larger pours
Pigments and fillers
Accidental overpour
Future project growth

If your normal gross load is 2,800g, a 3kg scale is technically close
enough but leaves little margin. A 5kg model is more practical.

500g Scale for Resin

A 500g scale can be useful for:

Resin jewelry
Tiny molds
Pigment testing
Color mixing
Small repair batches
Lightweight additives

A 500g x 0.1g model is versatile for small resin work.

A 500g x 0.01g model can be useful when pigments or additives regularly
require finer measurement.

1kg Scale for Resin

A 1kg scale is useful for:

Jewelry
Coasters
Small molds
Resin art
Small adhesive batches

It gives more room for the mixing container than a 500g scale.

For small-craft resin work, 1kg x 0.1g is a strong general
specification.

2kg Scale for Resin

A 2kg scale provides more flexibility for:

Multiple coasters
Medium molds
Larger resin-art batches
Small casting projects
Heavier cups

A 2kg x 0.1g scale is one of the most versatile choices for regular
resin crafting.

3kg Scale for Resin

Three kilograms is useful when:

You routinely mix more than 1kg
Containers are heavier
You make larger molds
You want capacity headroom

A 3kg x 0.1g model can cover many craft and workshop applications.

5kg Scale for Resin

A 5kg scale is a strong choice for:

Larger molds
Tabletop projects
Production batches
Larger casting work
Heavy mixing containers

The main tradeoff is that some higher-capacity scales offer coarser
readability.

Compare both specifications.

Do You Need More Than 5kg?

Large casting, river-table, and deep-pour projects may require
substantially more resin.

A higher-capacity scale can be appropriate, but large reactive batches
also introduce process considerations such as pot life and exotherm.
Follow the resin manufacturer's batch-size and pour-depth limits.

If you routinely need more than 5kg, prioritize:

Sufficient platform size
Strong container support
Display visibility
Capacity headroom
Appropriate readability

What Does 1g Readability Mean?

A 1g scale changes in whole-gram increments.

For a multi-kilogram resin batch, this may be sufficient if the
manufacturer's allowed ratio tolerance supports it.

For a 20g jewelry batch, whole-gram readability can be too coarse.

The smaller the batch, the more important finer readability becomes.

What Does 0.1g Readability Mean?

A 0.1g scale displays tenths of a gram.

Examples:

250.0g
125.4g
42.7g
12.3g

For many resin craft applications, 0.1g is the most practical
all-around readability.

It offers useful detail while remaining available in scales with enough
capacity for real mixing cups and medium batches.

What Does 0.01g Readability Mean?

A 0.01g scale displays hundredths of a gram.

Examples:

12.35g
4.28g
1.75g
0.42g

This can be useful for:

Pigment tests
Mica powder
Concentrated colorants
Tiny additive trials
Very small resin batches
Formula development

AWS's 0.001g vs. 0.01g scale
guide
explains why finer readability should be selected according to the
actual measurement task.

Do Resin Makers Need 0.001g?

Usually not for ordinary resin crafting.

A 0.001g scale is much more sensitive to:

Drafts
Vibration
Static
Temperature
Surface movement

Unless you genuinely work with milligram-level additives, 0.01g or 0.1g
is usually more practical.

Readability Is Not the Same as Accuracy

A scale that displays 0.01g does not automatically guarantee every
reading is accurate to ±0.01g.

When comparing scales, consider:

Readability
Accuracy specification
Repeatability
Minimum usable load
Capacity
Calibration requirements
Operating environment

The best resin scale is not necessarily the one showing the most decimal
places.

Why Repeatability Matters

Repeatability is the ability to obtain consistent readings from the same
stable load under similar conditions.

Resin work benefits from repeatability because you may want to
reproduce:

A successful color
A jewelry formula
A pigment concentration
A casting batch
A resin-to-hardener mix
An additive percentage

AWS's Why Does My Digital Scale Give Different
Readings?
explains that unstable surfaces, weak batteries, drafts, vibration,
temperature changes, improper calibration, overload, and off-center
placement can all contribute to inconsistent measurements.

Minimum Usable Load

The smallest displayed increment is not necessarily the smallest ideal
working quantity.

A scale that reads to 0.01g does not automatically mean 0.01g is a
reliable practical load.

When weighing very small pigment or additive quantities, check the
manufacturer's:

Minimum load
Accuracy specification
Tolerance
Repeatability information

Tare Is Essential for Resin Mixing

Tare allows you to remove the displayed weight of the mixing cup.

A typical weight-based resin workflow is:

Place the empty mixing cup on the scale.
Wait for a stable reading.
Press tare.
Confirm zero.
Add Part A to the calculated target.
Add Part B according to the product's specified weight ratio.
Confirm the final mass.
Mix according to manufacturer instructions.

TotalBoat's How to Mix TotalBoat Epoxy by
Weight
guidance uses this same general scale-and-zero approach.

Do Not Guess the Resin Ratio

The scale does not determine the correct ratio.

It only measures the mass you place on it.

The ratio must come from:

Product label
Manufacturer instructions
Technical data sheet
Official calculator for the exact system

TotalBoat's epoxy systems demonstrate why this matters: different
products from the same manufacturer can have different ratios by weight.

Example: 2:1 by Weight

If the manufacturer specifies 2:1 by weight, then:

200g resin requires 100g hardener.

100g resin requires 50g hardener.

40g resin requires 20g hardener.

But use this only if the exact resin system actually specifies 2:1 by
weight.

Example: 100:45 by Weight

If the product specifies:

100 parts resin : 45 parts hardener by weight

then 100g of resin requires 45g of hardener.

200g resin requires 90g hardener.

The ratio can be scaled proportionally.

Again, follow the exact product data.

Why Volume and Weight Ratios Differ

Imagine equal volumes of two liquids with different densities.

They occupy the same volume but do not have the same mass.

That is why a 2:1 volume ratio may translate to a different numerical
ratio by weight.

Never assume equivalence.

Best Scale for Epoxy Resin Jewelry

For earrings, pendants, rings, charms, and other small molds, consider:

500g--1kg x 0.1g

If batches are extremely small or pigment quantities are below 1g:

100--500g x 0.01g

can complement the main resin scale.

Best Scale for Resin Coasters

Coaster batches often fit comfortably within:

1--2kg x 0.1g

This provides enough capacity for the cup plus multiple pours while
retaining useful detail.

Best Scale for Resin Tumblers

For tumbler work:

1--2kg x 0.1g

is a useful starting point.

Choose capacity based on the largest batch you actually mix at once.

Best Scale for Resin Molds

Small and medium molds can often use:

2--3kg x 0.1g

Larger molds may justify 5kg+.

Best Scale for Tabletop Epoxy

For larger tabletop batches:

5kg+

may be appropriate.

Readability of 1g can be sufficient for some large batches, but the
correct choice depends on the manufacturer's weight ratio and acceptable
measurement tolerance.

Best Scale for Deep-Pour Resin

Deep-pour systems can involve large quantities, so capacity becomes the
first priority.

Use a scale that comfortably supports the complete batch and container.

Also follow the manufacturer's maximum pour depth, batch size,
temperature, and working-time instructions. A scale cannot compensate
for exceeding the resin system's process limits.

For makers comparing a compact precision scale with a larger-capacity
model, AWS's Best Digital Scale for
Jewelry
also provides useful lower-range scale-selection context, including the
tradeoff between fine readability, capacity, platform size, and
environmental sensitivity. Those same measurement principles are
relevant when resin jewelry projects involve very small pigment or
additive quantities.

Best Scale for Pigments and Mica Powder

Pigments can require much finer measurement than the resin itself.

A 100--500g x 0.01g precision scale can be useful for controlled
color development.

This allows you to document formulas such as:

Resin mass
Pigment mass
Pigment percentage
Additional colorant
Final batch mass

That makes successful colors easier to reproduce.

Best Scale for Resin Additives

Additives may include:

Pigments
Dyes
Fillers
Metallic powders
Glitter
Specialty modifiers

The correct scale depends on the actual quantity.

Do not automatically buy a milligram scale because an ingredient is
lightweight. Determine the smallest meaningful mass first.

One Scale or Two?

A single scale can work if all your projects fall within one useful
measurement range.

For many makers, however, two scales are more flexible.

Main resin scale

2--5kg x 0.1g

Use for:

Resin
Hardener
Medium batches
Mixing cups

Fine precision scale

100--500g x 0.01g

Use for:

Pigments
Tiny additives
Small formula tests

This setup avoids forcing one scale to cover both multi-kilogram pours
and sub-gram colorants.

Pocket Scale vs. Kitchen Scale for Resin

A pocket scale is useful for:

Pigments
Additives
Jewelry batches
Small repairs
Formula testing

A kitchen or bench-style scale is better for:

Larger mixing cups
Medium batches
Tabletop resin
Higher-capacity work

For resin makers who work across different project sizes, owning both
can be practical.

Platform Size

Capacity alone does not make a scale suitable.

A mixing cup should:

Sit securely
Be fully supported
Stay centered
Avoid touching the counter
Avoid touching the scale housing
Leave the display visible

If a large bucket overhangs the platform and touches the table, the
reading can be incorrect because the scale is not supporting the entire
load.

Display Visibility

Resin containers can be wide.

Look for:

Large digits
Clear decimal point
Backlight
Good viewing angle
Display position that remains visible

A remote or extended display can be useful on some high-capacity setups.

Calibration

A resin scale should have clear calibration or performance-check
instructions.

AWS's How to Calibrate a Digital Scale for Accurate
Results
explains that the exact calibration procedure and required reference
weight vary by model.

Follow the instructions for your specific scale.

Use the Correct Calibration Weight

Do not calibrate using:

Coins
Resin bottles
Cured resin pieces
Pigment jars
Household objects

Use the reference mass specified by the scale manufacturer.

NIST's Calibration of Mass
Standards
provides the broader metrology context: calibration establishes a mass
value with an appropriate uncertainty using suitable standards.

When to Check Scale Performance

Consider a check:

After transportation
After a drop or impact
After accidental overload
After long storage
After a major temperature change
When a reference reads unexpectedly
When repeatability changes

Calibration cannot repair physical damage.

Hard, Level Surface

Use the scale on a rigid, stable surface.

Avoid:

Fabric
Foam
Towels
Flexible silicone mats
Wobbly tables
Uneven surfaces

A precision scale measures force through its load cell. A flexing or
tilted base can reduce repeatability.

Airflow

Fine-resolution scales can react to air movement.

Keep 0.01g scales away from:

Fans
Open windows
HVAC vents

This matters especially when weighing very light pigments or additives.

Vibration

Vibration can come from:

Sanders
Drills
Shop equipment
Speakers
Foot traffic
Flexible workbenches

Do precision weighing before operating vibrating equipment nearby.

Temperature

Allow the scale to acclimate if it has been moved from a hot garage,
cold vehicle, or different workspace.

Do not place hot resin containers directly on the platform unless the
scale manufacturer permits the temperature.

Protect the Scale From Resin

Uncured resin can damage buttons, gaps, and electronics.

Use clean mixing cups and, where appropriate, a removable tray or
protective barrier that does not interfere with the scale's operation.

Keep resin away from:

Buttons
Platform gaps
Charging ports
Battery compartments
Display seams

Follow the manufacturer's cleaning instructions.

Do Not Store Heavy Objects on the Scale

A digital scale should not be used as a storage shelf.

Heavy resin bottles or tools left on the platform can continuously load
the weighing mechanism and may contribute to damage.

Store the scale unloaded and use its protective cover when provided.

Power and Batteries

Look for:

Low-battery indicator
Reliable batteries
Rechargeable option
Approved adapter
Predictable startup

Weak batteries can contribute to unstable readings.

Auto-Off

Auto-off saves power but can be inconvenient during resin preparation.

You may pause while:

Calculating the ratio
Opening containers
Adding pigment
Preparing molds
Recording a formula

Choose a scale with timeout behavior that fits your workflow.

Gram Mode

Grams are convenient for resin formulation because they make ratio
calculations straightforward and avoid very small decimal ounces.

If the manufacturer's ratio is expressed by weight, the ratio itself is
proportional and can be used with compatible units, but grams are
usually convenient for craft-scale work.

Record Your Resin Formulas

A scale becomes more valuable when you document the measurements.

Record:

Resin brand/system
Part A mass
Part B mass
Weight ratio used
Pigment type
Pigment mass
Additives
Total batch mass
Room temperature
Cure observations
Project type

This helps reproduce successful results.

Scale Accuracy Cannot Fix an Incorrect Ratio

Even a perfectly calibrated scale will produce a bad formulation if you
enter the wrong target.

Common ratio errors include:

Using a volume ratio as a weight ratio
Reversing Part A and Part B
Using the ratio for another product
Adding "extra hardener"
Miscalculating the batch
Forgetting container mass when capacity is limited

TotalBoat's mix-ratio
guidance
emphasizes using the specified ratio for the exact epoxy system because
incorrect proportioning can prevent proper cure.

Mix Thoroughly After Weighing

Accurate weighing is only the first step.

Manufacturer instructions commonly emphasize thorough mixing and
scraping the sides and bottom of the container.

System Three's epoxy measuring and mixing
guidance
advises thorough mixing according to the product instructions, while
TotalBoat similarly instructs users to scrape the sides and bottom.

A perfect ratio that is poorly mixed can still produce inconsistent
results.

Do Not Mix More Than You Can Use

Two-part epoxy begins reacting once combined.

Larger batches can build heat and reduce working time.

Follow the resin manufacturer's:

Pot life
Maximum batch size
Pour-depth limits
Temperature recommendations

The scale determines mass; it does not control the chemical reaction.

500g vs. 1kg Resin Scale

Choose 500g for:

Jewelry
Pigments
Tiny molds
Small repairs

Choose 1kg for:

Larger jewelry batches
Coasters
Small art projects
More container headroom

For general small resin work, 1kg is often easier to grow into.

1kg vs. 2kg Resin Scale

Choose 1kg for compact craft work.

Choose 2kg when:

You make larger coaster batches
Cups are heavier
You want more headroom
You work with medium molds

2kg vs. 5kg Resin Scale

Choose 2kg for most small and medium crafts.

Choose 5kg when:

You make larger molds
You mix tabletop batches
You want substantial headroom
Containers are heavy

0.1g vs. 0.01g Resin Scale

Choose 0.1g when:

Resin and hardener are the main use
Batches are tens or hundreds of grams
You want practical capacity

Choose 0.01g when:

Pigments are frequently below 1g
Tiny jewelry batches are common
You are developing repeatable color formulas
0.1g is too coarse for the task

Why More Decimal Places Are Not Always Better

Higher-resolution scales tend to be:

Lower capacity
More environmentally sensitive
Smaller
More demanding about setup

If your normal resin batch is 2,000g, a 200g x 0.01g pocket scale cannot
replace your main scale.

Choose the range first.

Why More Capacity Is Not Always Better

A 20kg scale may easily support a resin bucket but may offer readability
that is too coarse for small craft batches.

Capacity and readability must be evaluated together.

Best Setup for Resin Beginners

A beginner making jewelry, coasters, and small molds can consider:

2kg x 0.1g

This provides useful capacity and fine enough increments for many
craft-scale batches.

If tiny pigment quantities become important, add:

100--500g x 0.01g

Best Setup for Resin Jewelry Makers

Consider:

500g--1kg x 0.1g

plus an optional:

100--500g x 0.01g

for pigments and tiny experiments.

Best Setup for Resin Artists

For mixed-size art projects:

2--5kg x 0.1g

is a versatile main range.

Add a fine scale when developing precise pigment formulas.

Best Setup for Larger Casting Work

For larger pours:

5kg+

may be necessary.

Select the capacity from the complete bucket plus resin/hardener load
and leave headroom.

Use a separate precision scale for additives when needed.

Common Resin Scale Buying Mistakes

Buying by capacity alone

A high-capacity scale may be too coarse for small batches.

Buying by decimal places alone

A 0.01g display does not automatically mean better performance for every
task.

Ignoring cup weight

The container counts toward capacity.

Assuming tare increases capacity

It does not.

Using a volume ratio on a scale

Use the product's specified weight ratio when measuring by mass.

Assuming every 2:1 resin is 2:1 by weight

The numerical ratio may differ between volume and weight.

Ignoring minimum load

Very small pigment quantities need a scale whose usable range supports
them.

Using a platform that is too small

The cup or bucket must be fully supported.

Blocking the display

Test your real containers.

Working on a soft surface

Use a hard, level surface.

Weighing next to vibrating tools

Move precision weighing away from shop vibration.

Calibrating with household objects

Use the specified reference weight.

Letting resin enter the scale

Protect the electronics and platform gaps.

Mixing too large a batch

Follow the resin manufacturer's pot-life and batch-size guidance.

Resin Scale Buying Checklist

Before buying, ask:

What resin projects do I make?
What is my largest batch?
How much does the mixing container weigh?
What is my maximum gross load?
How much headroom do I need?
Is 500g enough?
Would 1kg be better?
Do I need 2kg?
Would 3kg cover future projects?
Do I need 5kg or more?
Is 1g readability enough?
Would 0.1g be better?
Do I need 0.01g for pigments?
Is 0.001g unnecessary?
What accuracy does the manufacturer specify?
What is the minimum usable load?
Is repeatability appropriate?
Does it have tare?
Does it measure grams?
Is the platform large enough?
Can I see the display with my mixing cup?
Does it settle promptly?
Does it return reliably to zero?
Can it be calibrated?
What calibration weight is required?
Is a calibration weight included?
Can the scale be protected from spills?
Is the power source practical?
Is auto-off suitable?
Would two scales cover my projects better?

Frequently Asked Questions

What is the best digital scale for resin?

For many resin makers, a 2--5kg scale with 0.1g readability is a strong
main-scale range. Small jewelry work may use 500g--1kg, while pigments
can benefit from a separate 0.01g precision scale.

What capacity scale do I need for epoxy resin?

Add the maximum resin and hardener quantity to the mixing-container
weight and choose a scale with comfortable headroom.

Is a 500g scale enough?

It can be excellent for jewelry, tiny molds, pigments, and small repair
batches.

Is 1kg enough?

One kilogram works well for many small craft projects.

Should I buy a 2kg scale?

A 2kg x 0.1g scale is a versatile choice for regular resin crafting.

Do I need a 5kg scale?

Choose 5kg when your larger molds, tabletop batches, or containers
approach the limits of a 2--3kg scale.

Is 0.1g accurate enough for resin?

For many craft-scale batches, 0.1g readability is practical when the
scale's accuracy and other specifications are appropriate.

When do I need 0.01g?

Choose 0.01g for tiny pigment quantities, small jewelry batches, and
formulation tests where 0.1g is too coarse.

Do I need 0.001g?

Usually not for ordinary resin crafting.

Can I mix epoxy by weight?

Yes when the manufacturer provides or approves a ratio by weight. Use
that exact weight ratio.

Is a 2:1 volume ratio also 2:1 by weight?

Not necessarily. Resin and hardener can have different densities, so
follow the product-specific weight ratio.

Does tare increase scale capacity?

No. The mixing cup remains part of the physical load.

Should I calibrate my resin scale?

Follow the manufacturer's calibration and performance-check
instructions.

Can I use coins to calibrate it?

Use the specified calibration weight rather than improvised household
objects.

Why does my scale fluctuate?

Possible causes include drafts, vibration, weak batteries, unstable
surfaces, temperature changes, static, off-center loads, overload, or
calibration issues.

Should I own two scales?

If you make both large pours and tiny pigment measurements, a 2--5kg x
0.1g main scale plus a 100--500g x 0.01g precision scale can provide a
useful combination.

Final Verdict: Best Digital Scale for Resin

The best digital scale for resin is the model whose capacity and
readability fit your real project range.

For most resin makers, start with:

2--5kg capacity x 0.1g readability

This is a practical range for:

Resin
Hardener
Coasters
Tumblers
Molds
Resin art
Medium casting batches

For jewelry, pigments, and tiny formulation work, consider:

100--500g x 0.01g

or a 500g--1kg x 0.1g compact scale depending on the quantities
involved.

Always calculate capacity from:

mixing container + resin + hardener + additives

and remember that tare does not increase physical capacity.

Most importantly, use the measurement basis specified for the exact
resin product. If the manufacturer gives a ratio by weight, use that
weight ratio. Do not substitute the numerical volume ratio unless the
manufacturer confirms they are the same. TotalBoat's current epoxy
guidance shows that weight ratios differ by product and explains that
resin and hardener densities are why weight and volume ratios can
differ.

Choose a scale with reliable tare, sufficient platform size, a visible
display, stable zero, appropriate minimum load, repeatable readings, and
a clear calibration procedure. Use it on a hard, level surface away from
vibration and drafts.

For calibration, follow the scale manufacturer's instructions and use
the specified reference weight. NIST's mass-calibration framework
reinforces the underlying principle: dependable mass measurement
requires appropriate standards and understood measurement performance.

For additional calibration context, NIST's Calibration Procedures for
Weights and Measures
Laboratories
documents standardized calibration procedures designed to support
metrological traceability and uncertainty. A resin workshop does not
need to reproduce a metrology laboratory, but the principle of using
defined procedures and appropriate references still applies.

A good digital scale cannot correct an incorrect resin formula, but it
can make a correct weight-based formula much easier to reproduce. Match
the scale to the batch, follow the resin manufacturer's ratio, document
your measurements, and use separate high-capacity and fine-precision
scales when one instrument cannot comfortably cover the full range.