Changing Paint Finish - Painting Flat Over Glossfinish - Is it possible to De-gloss paint?
Flat and glossy paints have different concentrations of pigment relative to binder.The binder is the glue that holds the paint together and the ingredient that gives it its color.Light is reflected and absorbed by binders and pigments.The washability of the surface will be affected by the fact that the paint is porous and nondurable.
The sheen of a paint product is a measure of the amount of light it reflects.The higher the PVC, the flatter the paint; products labeled flat are usually 40 percent.The paint has a PVC of 15 percent.If you want to change a can of paint from gloss to flat, you have to add enough pigment to increase its volume by 25%.If you have a gallon of gloss paint, you need to add about a quart of pigment to make it flat.
There are at least two reasons why it would be impractical to add such a large volume of pigment to your paint.It will be difficult to maintain the color, and the paint won't perform as well, so it will rub off more easily and be less durable.The need to flatten the paint mixture could be eliminated with a couple of simple alternatives.
Light-dispersing Additives are used to make gloss varnish flat and flatten a gloss paint finish.After applying one or two coats of gloss paint, apply a coat of flat varnish.It is possible to buy varnish products that are specifically made for this purpose.
You can degloss it after it's dried.A strong mixture of trisodiumphosphate and water is one way to wash it.