State the Measurement Basis of a Conformal-Coating Dilution Recipe

A dilution instruction such as two parts coating to one part thinner is incomplete unless the measurement basis is explicit. Mass and volume ratios are not generally interchangeable because the liquids may have different densities. Write the recipe so another operator can reproduce the same mixture using the intended equipment.

Identify the approved thinner first

Techspray identifies Turbo-Coat Thinner as a viscosity-adjusting product for its Turbo-Coat coatings. This is product-specific compatibility information. Confirm both the chemical compatibility and the ratio basis with the relevant current technical information before turning a recommendation into a shop-floor formula.

Record the coating and thinner product codes, lot identities, container condition, and application method. A solvent that cleans equipment is not automatically an approved coating diluent. Keep an approved formulation change separate from replacing evaporated solvent during normal operation.

Make the arithmetic reviewable

If an illustrative validated instruction specifies 100 grams of coating plus 20 grams of thinner, write those units directly. Its ratio is five to one by mass. If the same numerical quantities are measured in milliliters, the resulting masses depend on the respective densities. Do not silently switch a scale-based recipe to graduated cups.

• State whether the ratio refers to additions or the final mixture.
• Define tare, measurement resolution, and acceptable preparation tolerance.
• Record actual amounts rather than only the target recipe name.
• Identify mixing, settling, and verification steps from the qualified method.
• Label the prepared mixture with its identity and permitted use conditions.

Verify the application after preparation

Check viscosity using the approved method and temperature, then verify deposited coverage and thickness on representative assemblies. A correct recipe does not prove that a different nozzle, pressure, or traverse program produces the same film. Keep the coating-inspection evidence connected to the prepared mixture.

For an open dip tank, solvent loss can change the mixture during use. Record replenishment separately from the initial batch, and follow the supplier’s and process owner’s method for restoring the operating condition. Repeated unmeasured additions make the original recipe label progressively less informative.

Compare handling time with the cure and release requirements. A thinner change may alter application behavior and the drying process even when the final appearance looks similar. Release the recipe only when the preparation method and resulting film evidence describe the same qualified process.