It has been reported that the amines taking place in the structure of the solvent based varnished turn yellow in time as a result of oxidation, but these chemicals causing to yellowing have not been used in the production of water based varnishes
(Johnson, 1997) and in addition; the water based varnishes
are the chemical reaction drying ones which do not change the color of the wood material, mostly produced as colorless and scentless and which do not turn yellow (Yildiz, 1999).
Comparing [R.sub.rms] values of all the varnish groups (Groups 3, 4, and 5) with Group 2, a statistical difference (p < 0.05) was found, suggesting that all the varnishes
had a protective effect against enamel demineralization.
Comparison of the depth and mineral density of the lesions treated with different varnish types indicated no significant difference in depth reduction and mineral density preservation among different groups including conventional fluoride varnishes
and fluoride varnishes
with added calcium and phosphate (P > 0.05).
Market data on demand volume for each country is split by types of paints and varnishes
as well as technology (water based, solvent based, powder coatings, and other products).
- Paints and Varnishes
in Philippines to 2018: Market Databook
This will create demand for paints and varnishes
in China, enabling the country's paints and varnishes
market to achieve a CAGR of 12.9 I % percent over the forecast period.
, the highest gloss value (95.2) was obtained with polyurethane and the lowest value (41.2) with the water-based varnish.
There is evidence that NaF varnishes
are indeed effective in increasing the fluoride uptake and reducing mineral loss of the enamel under different circumstances.
The number of studies reporting on efficacy in the primary dentition was limited; 1 for gels [van Rijkom et al., 2004], none for rinses, and 3 for varnishes
[Borutta et al., 2006; Weintraub et al., 2006; Hardman et al., 2007] A summary of the studies is given in Tables 2 to 4.
The semi-drying oils are used in varnishes
where a lighter color (less yellow) is desired.
Parquet and woodblock flooring BEFORE applying non-breathing seals, namely varnishes
, floors should first be treated with an application of liquid solvent wax.
Veneer samples taken from oak and Oriental beech were first varnished with celluloid, synthetic, polyurethane, and polyester varnishes
, and then subjected to a treatment in sodium hydroxide, acetone, detergent, and acetic acid for 48 hr.
Chiapas says that it is now ready to begin application of fluoride varnishes
in the main town it serves as well as in the surrounding pueblos.
If you take time to apply stains, varnishes
and polishes you can give an attractive, durable finish to wood.
The company's electrostatic oil cleaning systems remove insoluble contaminants, including tars and varnishes
, from hydraulic oil systems, allowing maximum control and performance of injection molding machines.