How to read a powder coating technical data sheet (TDS).

Steps

1. Confirm system and use

   Check the resin system and whether the product is for indoor or outdoor use. This determines where it can go before any other figure matters.

2. Note the cure schedule

   Read the cure window as metal temperature and time. Check that your oven can achieve it on your heaviest parts.

3. Check powder properties

   Look at specific gravity and particle size. Specific gravity is needed for coverage estimates; particle size affects application and finish.

4. Read the test conditions

   For mechanical and resistance results, note the substrate, pretreatment, film thickness and test method used. Results on laboratory panels may differ from your parts.

5. Check storage guidance

   Note recommended storage conditions and shelf life, especially for low-cure grades.

6. Cross-check certificates

   If an approval is mentioned, confirm that it covers that specific product, colour and finish.

Parameters

Polyester specific gravity (catalogue)

1.4–1.8 g/cm³ depending on colour and gloss

Polyester particle size (catalogue)

Average 30–38 µm; >90% between 10 and 84 µm

Cure schedule

per TDS

Storage and shelf life

Storage stability tested at 6 months below 30 °C; follow the TDS for each product

Common mistakes

• Comparing test results from two suppliers without checking film thickness and substrate.
• Reading the cure temperature as oven air temperature.
• Treating an in-house test result as an independent certificate.
• Assuming an approval listed for one product applies to the whole range.