• Wednesday, June 02nd, 2010
Is it important whether or not a coating is classified as “nano” and does it affect the quality itself?
Nanoscale technologies are the development and use of devices that have a size of only a few nanometers. The prefix nano means ten to the minus ninth power (10 ‾‾ ⁹), or one billionth of a meter, a simple metric measurement.
However, what’s relevant is not the thickness of the coating itself (1-100 nanometers or some other “micro” measurement) but rather:
Nanotechnology and self cleaning glass »
What one should know about the difference between the pyrolytic “self-cleaning” glass and any other easy-to-clean or hydrophobic glass:
The pyrolytic Self-cleaning glass consists of a hydrophilic coating with photocatalytic properties fused into the glass at high temperatures during the manufacturing process.
The limitations of pyrolytic Self-cleaning glass »
• Wednesday, May 26th, 2010
Does the contact angle define quality and durability of the coating for self cleaning glass?
This is probably the single most relevant question one can ask about any hydrophobic easy-to-clean coating and perhaps the MOST HIDDEN fact by most coating suppliers as it truly uncovers the truth behind the quality of the product. Yet, most coating suppliers will typically evade this critical issue with all sorts of misleading statements and false claims:
The difference between mediocre, good and excellent hydrophobic coatings »
How to measure the water-repellency or “hydrophobicity”
The measurement that defines how water-repellent a surface is after being treated with a hydrophobic coating is called “contact angle”, also called ‘wetting angle’, which is the angle formed by the material’s surface and the tangent of the interface between the fluid (i.e.: water) and the environment at the point of contact (the glass surface for example).
Visit this Wikipedia webpage or further “contact angle” information