Some translations :
Viscosité (en Poises) à l’eutectique du Custer
Feldspar avec ajouts de matières premières.=
Viscosity (in Poises) at the eutectic of melted
mixtures (as fritted materials) based on Custer
Spar enriched by raw material additions.
Viscosité du flux à l’eutectique (en Poises).=
Flow viscosity at the eutectic (in Poises).
Ajouts de matières premières à 100 parties de
Custer Feldspar.=
Raw materials additions to 100 parts of Custer
Feldspar.
N.B. Dolomie= dolomite
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Since the formulas of feldspars and feldspar-like
materials are somewhat similar to those of high
temperature glazes we used this last principle as
a starting point to make a comparative study of
the viscosity at the eutectic of the potassium
feldspar Custer to which different concentrations
of raw materials were added.
Throughout the experiment Custer remained
identical at 100 parts but increasing amounts
of the following materials were tested :
1-Silica,
2-Kaolin-K,
3-Dolomite,
4-Alumina,
5-Talc.
It should be remembered that these measures
of viscosity are valid only if the « Custer+added
material » mixture is completely melted
(or transformed into a frit).
Smart.Conseil
http://perso.wanadoo.fr/smart2000/index.htm
Édouard Bastarache
http://www.flickr.com/photos/30058682@N00/
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