What do they put in painting ?
Jens Damgaard
scoolreport)
I know there is a lot of water and some colour and so, but is there anyone
who has a side with that. Where schould i search ? Please help at Dane in
confusion
Jens
mal...@farvelade.dk
Cheer
There are many different kinds of paints, but this site will help you
with what acrylic artists paints are made of. Click on "Product
Information".
Les Ireland
include Alcolhol or shellac based, silicone, and acrylic (which is sometimes
synonymous with Latex).
In all paints, about 30 to 60 percent of the makeup is solvent - (water,
mineral spirits, oil, xylene, or any other variety). Latex paints are
dominantly Water-based, and Alkyd paints are dominantly Oil-based.
In all paints, the balance is made up of Solids. Depending on the product,
these can be resins of all sorts, concrete, titanium dioxide, propylene
Glycol, and a variety of other additives.
In Latex, the special ingredient is a synthetic Latex resin. There are
literally hundreds of different resins out there for different tasks. There
are also emulsifiers, and surfactants - to prevent foaming.
Alkyd paints have Alkyd Resin which is only soluble in oil-solvents or
mineral-spirits. Again, there are many different resins. Titanium Dioxide,
concrete, and propylene glycol are all common additives as well.
Titanium dioxide gives the product it's WHITE appearance. It also adds
hiding ability. A product with a lot of Titanium Dioxide is generally more
expensive, but it covers better so is usually worth the expense.
Concrete in paint is usally just filler. It helps coverage, but unless it
has a WICKED resin, it will likely wash off the wall very easily. A bad
thing for paint ;>
Propylene Glycol serves several purposes. It is soluble in both oil and
water, and is usually the vehicle for the colorants. The colorants
themselves are made of metals and organic chemicals, like Iron and phenols
respectively. Propylene glycol also serves as an anti-freeze in the paint
so that it can handle lower temperatures without damaging the product.
Finally it slows the dry-time in latex paints. Paint that dries to quickly
is hard to work with, so adding a little more of this stuff will make it
smoother and easier to work with.
Surfactants and emulsifiers will help a product prevent foaming. You can
imagine that a product with lots of bubbles would look terrible on a wall.
This stuff cuts the bubbles right out of the paint. It also then pours more
smoothly, and is often less spattery (Propylene glycol helps that too). You
will notice that flat latex paints often smell like soap - that's the
surfactant you smell.
If you contact any of the labs for major paint companies, they will gladly
give you some MSDS sheets on what goes into specific products.
Mike