Shore A vs. Shore D: How to Read Coating Hardness Values
Read the number, scale and test method together. Learn what Shore hardness measures and why one value cannot choose a coating for the whole job.
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Use finished coating samples to compare color, gloss and texture under relevant lighting, then keep a clear record of the appearance approved for the project.
Two gray coatings can look close on a screen and noticeably different on the finished surface. Before a color choice becomes an order, compare an actual finished sample with the lighting, texture and surrounding materials that matter to the job. A color name is a useful starting point, but it is only one part of the appearance you are approving.
This guide is about evaluating appearance and documenting a choice. Product suitability, application requirements and safety remain separate decisions for the manufacturer, responsible specifier and trained applicator. A sample that looks right does not establish that a coating system is right for the service conditions.
Online swatches are convenient for narrowing the field. They are less useful as a final reference for a real coated surface. Sherwin-Williams' industrial flooring color card explicitly describes its reproduction as an approximation and identifies product type, gloss, texture, lighting and application among the factors that can affect appearance.
Use that distinction to organize the decision. Save two or three candidate names or codes, then ask what physical sample can represent the proposed system. Do not approve a custom match solely by comparing a phone photo with another phone photo. The reference should be something the supplier and the person approving the finish can identify consistently.
If a sample is unavailable, keep the appearance decision open and ask what alternative comparison the supplier recommends. Avoid treating a small printed chip, a digital rendering and a finished panel as interchangeable evidence.
Request the product name, color identifier, surface finish and any topcoat used on the sample. Also ask whether its texture represents the planned installation. A panel prepared with a different finish may be helpful for discussion, but it should be labeled as such.
For example, the HighLine 410 shop listing identifies one specific ArmorThane coating. If that product is being considered, ask ArmorThane which sample and current documentation represent the proposed system. Do not assume that a color offered with another coating is available or suitable in this one.
Keep the appearance request concrete: “We want to compare this color in the specified coating and finish beside the existing gray equipment.” That is easier to resolve than “Can you match this picture?” It also leaves room for the technical team to explain a limitation before materials are ordered.
A smooth, reflective sample and a textured, low-gloss sample can create very different impressions. Sherwin-Williams' coating color terminology distinguishes gloss, which concerns reflected light, from color, and identifies texture as a surface-finish characteristic.
During the comparison, describe each observation separately. Instead of “the gray is wrong,” note whether the sample looks lighter, warmer, shinier or more textured than expected. Those observations point to different questions and help prevent a color adjustment from being used to solve a finish mismatch.
Place the candidates in the same orientation and view them together from similar positions. If the final surface will be vertical, include a vertical comparison; if it will be horizontal, include that view too. Keep the setup consistent enough that you can explain what changed between observations.
Color-measurement specialist X-Rite explains metamerism as a situation where two colors appear to match under one light source but differ under another. This is especially relevant when a new coating sits beside an existing surface made from a different material or finish.
As a practical comparison, view the sample alongside the reference in the lighting that matters to the project. That might include daylight at a doorway and the installed interior lighting. Record the conditions rather than relying on a memory of how the panel looked somewhere else.
This informal review is not a substitute for a specified laboratory or controlled-light assessment. If the project requires a close match, ask the responsible party to define the comparison method, lighting and acceptance criteria. Do not invent a numerical color tolerance or assume that “looks close” satisfies a written specification.
Once the relevant people agree on an appearance reference, give it a clear identifier and keep the related information together. A simple record can include:
Retain the physical reference as agreed with the supplier. Photographs are useful for locating it and showing the setup, but should not silently replace the approved sample. If the proposed product, finish or topcoat changes, ask whether the appearance comparison needs to be repeated.
Finally, discuss outdoor exposure and future appearance separately from the initial color match. The sample shows a finish at one point in time; it is not evidence of long-term color retention. Bring those service questions to ArmorThane's technical team with the exact system and project details. A well-documented sample makes the conversation clearer without asking the color chip to answer every performance question.
Cover image shows conceptual coating panels, not an official ArmorThane color chart.
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