Ancient Egyptians used a formula which involved mixing the colors with a gummy base. The Egyptians used approximately six colors which were white, yellow, blue, green, red and blue. These colors were applied without mixing them. The modern times showed the shift from natural pigments to synthetic dyes. The base also changed from water to oil various other applicable bases. The latest in the innovation of paint and its associated technology is the 2 pack painting.
Before the arrival of House painting, simple cellulose paints were being used. This means that the clear resin base (nitrocellulose) had a basic color suspended in it and the secondary colors were made by mixing the primary colors and the metallic colors involved suspending fine aluminum flakes into the resin. This paint system was based on the solvent evaporation system where the base evaporated while spraying on the surface. This is in stark contrast to the 2 pack painting. The system contains two segments – an acrylic base and a poly-isocyanate hardener. Mixing these two systems hardens the mixture which can be accelerated by heating. This creates a harder and more resistant coat of paint.
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| 2 Pack Painting |
Here are some key aspects about the 2 pack painting system which must be kept in mind while utilizing this system:
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| 2 Pack Painting |
# It is more resistant than the traditional cellulose paint. Cellulose can often be dissolved by petrol and degraded by sunlight and acid rain. Cellulose paints have the tendency to go dull or even gather a milky haze. The 2 pack painting triumphs over this. The paint hardens on its own creating a resistant coat of paint. Since acrylates and isocyanates form the base, the coat is less susceptible to the external environmental conditions.
# The coating and painting time can be largely reduced. Application of heat catalyzes the hardening process of the polymer base. A standard 2 pack painting can be completed in 40 minutes.
# pack painting is a much more effective way of House painting. The cellulose system employs a whole lot of thinner to help it to stay in the liquid form. The quantity of this can be as high as 50%. Since this thinner evaporates to leave a coat of paint, a lot of coat must be applied to get the final paint joFb which increases the time of the paint job. Its successor has much less thinner content, which essentially means that a few coats of paint can give you a brilliant finish.
# The major problem with the 2 pack system is that it has a high volume of HAPs. HAPs or Hazardous Air Pollutants can cause considerable damage to the normal physiology of the body in case of accidental contamination. Serious disorders such as asthma, bronchitis and heart attacks can happen if a person comes into the contact of the base. The asthma and bronchitis can be attributed to the presence of Volatile Organic Compounds and the isocyanates. Metal ions may cause neurotoxicity. For this reason, the application of this paint system must be done in a well-ventilated area with the personnel that operates it in special gear to protect them from the chemicals.