- May 23, 2015
- 25,771
- Pool Size
- 16000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
There's two part to colored plaster that are important. The first is if you want to have colored plaster then the colorant must come from an inorganic dye. For example, if you want a blue color to your plaster, then it should be mixed with a pigment blend that contains "cobalt blue" which is cobalt aluminate (CoAl2O4). Cobalt blue is an inorganic oxide of cobalt and aluminum that is completely color-fast (resist oxidation by chlorine). Unfortunately, many plaster mixes will use organic dyes (carbon compound) as colorants and those dyes are highly susceptible to bleaching. Second, if you want to avoid plaster color variations and white-spotting, then the applicator must not use calcium chloride accelerant in their mix and the guys doing the trowel work must be very careful to trowel properly and avoid using a lot of water to lubricate the trowel. Increasing water content at the surface can change the properties of the cement which can lead to color variation.
Lighter colors and grey are definitely better than dark colors, but skill matters too. Its really important to discuss these issues with the applicator to see if they're willing to do what is best for your final outcome rather than easiest for them to get done.
Lighter colors and grey are definitely better than dark colors, but skill matters too. Its really important to discuss these issues with the applicator to see if they're willing to do what is best for your final outcome rather than easiest for them to get done.