One day at a busy airport, the passengers on a commercial airliner are seated, waiting for the cockpit crew to show up so they can get under way. The pilot and copilot finally appear in the rear of the plane, and begin walking up to the cockpit t... Read more of Blind pilots at Free Jokes.caInformational Site Network Informational
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Cobalt Purples








are obtainable ranging from the richest crimson purple to the most
delicate violet. We have produced them by wet and dry methods, varying
in brilliancy and beauty, but characterised generally by want of body,
and frequently by a smalt-like grittiness. Chemically, good and stable
colours, they are not received with favour on the palette, and certainly
may be very well replaced by mixtures of cobalt blue and madder red.
When a permanent compound is obtainable equal in colour to an original
pigment, and superior in its physical attributes, no objection can
fairly be taken to its artistic preference. There are other things to be
considered in a pigment besides permanence, or even permanence and
colour combined. The two together do not constitute a perfect pigment,
that is, a material of practical utility and value. In the last
chapter, allusion was made to a green which possesses both the one and
the other, and yet is--at present, at least--quite unfitted for artistic
use. Hence, with a strong partiality for simple original pigments, we
are bound to confess there are cases where mixtures are justifiably
preferred. All we contend for is, that each constituent of such mixtures
should be stable, and neither give nor receive injury by being
compounded.





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