The dilution process of PU color paste requires careful consideration to ensure the quality and performance of the final coating. Here are the general dilution steps:
Choose a diluent:
Use a diluent that is compatible with the PU color paste. Common diluents include polyurethane-specific diluents, solvent-based diluents (such as alcohols or ketones), or water (for water-based polyurethane colorants).
Measure the ratio:
Dilution is performed according to the ratio recommended by the colorant supplier or in the product instructions. Generally, the amount of diluent added affects the viscosity and application performance of the colorant.
Mixing:
Mix the colorant and diluent in a clean container. Make sure the mixture is evenly mixed to avoid bubbles or separation.
Stirring:
Use a stirrer or stirring rod to stir the mixture thoroughly to ensure that the colorant and diluent are completely incorporated. Be careful not to stir excessively to avoid introducing air bubbles.
Test viscosity:
Check whether the viscosity of the diluted colorant meets the requirements through a viscometer or coating test. If necessary, the amount of diluent can be adjusted appropriately.
Make a trial coating:
Before actual application, make a trial coating on a small area or sample to check whether the color and performance meet expectations.
Storage and Use:
Store the mixed color paste in a sealed, cool environment, away from direct sunlight or extreme temperatures. Use the mixed color paste as soon as possible according to the application requirements to ensure the best results.
