As we have said previously that the dyes are organic compounds that dissolve in water or alcohol an

Dr.Ehab Fathy Gabr Aboueladab foam paper (PhD in Biochemistry), Associate Prof.Dr. of Biochemistry, Damietta University, Faculty of Specific Education Damietta, New Damietta City, POBox.34517, Egypt, Tel :002-057-2224444 (HOME), foam paper 002-057-2403085 (WORK), 002-0100-7834123 (MOBIEL or HANDY), Email: ehab10f@gmail.com, ChatYahoo: ehababoueladab@yahoo.com, http://www.labhoo.com, http://www.citeulike.org, http://vadlo.com, www.thesciencejobs . com, http://medicalppt.blogspot.com, http://www.medbio.info
Is a homogeneous mixture of organic materials and inorganic solid and liquid materials .. In addition foam paper to the color used for different foam paper surfaces (metal - wood - concrete ... etc.) in the form of a liquid layer to be colored foam paper by the particles foam paper of matter suspended in the spacing of the particles of the Association
They are used in small quantities and through it can determine the purpose of the paint and also solve the problems of the application and industrialization.
For the protection of metallic structures and wooden and concrete foam paper conditions of extreme exposure and erosion factors (such as rainfall, humidity and sunlight) and these conditions lead to damage to the surfaces of the interfaces of the installations after a period of establishment, such as iron rust or rot wood surfaces leading to maintenance or restored and that cost us a lot of money and so it coating surfaces must be especially prone types of paints protection leading to protection and survival for long periods without damage.
Since the pigments do not dissolve in the middle rack, but remain suspended in the center and after grinding softness required and give some additional material to remain suspended in central pregnant, she obscures the surface to be coated completely and also have the ability to spread in the center rack and has a capacity of resistance to light and weather factors .. the pigment should be available by the following:
It is natural dyes have been teaching them some of the properties by slight modification in some of the properties to be used for different purposes such as a:
4 - Do not float on the surface of the paint.
- The different foam paper particle size affects mainly the ability to Altakbih for dyes white rather than affect colorants other because the colorants other give their color by absorbing light the whole, except for the color of Article colored As for dyes white, it gives color by reversing or bounce light of the all-Ali surface.
Whenever the ability to bounce the light from the surface is the key factor in the ability of white pigments Ali Altakbih .. This capability is added to absorb some light for other dyes and colorings, the ability of non-white is generally higher in Altakbih of white pigments example:
- The nature of the pigments in terms of usability and wetting the grain size itself.
Colorings its image known no granules in the form of a separate, but there are in the form of clusters and the milling process, foam paper but to break up these gatherings, but by material help to the process of grinding and cracking these granules within the article Association.
Yellow: Yellow Hansa - yellow Bnzdin
Is the organic compounds with different colors produced from a series of chemical reactions and characterized to have a very high tinting strength and a highly constancy of light but a weak coverage does not dissolve in water and is known Palmllonat weak coverage.
As we have said previously that the dyes are organic compounds that dissolve in water or alcohol and this is a fundamental difference between pigments and dyes as pigments dissolve foam paper in the middle rack while the pigments transparent does not melt and remain among the particles of the Association, but the particles have a transparent and colorings transparent because they are highly stability of various foam paper factors (light - heat - and acids), they are used in the production of paints that a high degree foam paper of efficiency and is also used for the purposes of coloring foam paper to get the colors dim photoresist using the concentrations of which are simple examples:
- Used in large quantities in the initial paints (PRIMERS) to improve the adhesion layer final.
Is known as the center of media in rural pregnant or article Association where he holds the particles foam paper colored materials, the same degree of importance of pigments may even superiority in importance because the bonding material is attached to the surface foam paper Pigment Had this article Association is capable of this work, the age of paint that becomes a short determine the type of paint where Shines (Off - The glossy) and attributes in terms of drought and operating foam paper conditions.
It is that it does not happen any chemical reactions during the dehydration process and is drought once the volatilization of solvents foam paper to give a coherent solid layer coating so the dryness of these materials depends on the speed and quality of the volatility foam paper of the solvent in terms of the strength and rate of evaporation Examples of these bonding materials:
We find that once the drought is blowing solvent does not occur any chemical reaction can therefore be removed layers of paint on surfaces easily in the same solvents used in paints, except Paints emulsified (water) as it is difficult to remove after drying with water, but other solvents.
- Stems from the nature of the oils in the plant kingdom and the animal and draw in many ways the most important eras or extraction solvents and oils can be prepared in the industry interaction fatty acids (saturated and unsaturated) and the extracted oil with natural or synthetic glycerin industrially
Oils are dry after offering them a simple thickness of the atmosphere where it is absorbed nervosa