Altana Liquid Color Standards Manual Manuale Utente Scaricare il pdf (Pagina 6)

for oils in this range. These tubes were adjusted

to bring them into line with accepted usage, and

a slight change was made in Tube #6 to equalize

the spacing. This was published as a new method,

DI544-58.

However, continuing problems with production

and standardization of the liquid colors at that

time resulted in demand for glass disks as primary

standards. The method was again revised to

use glass disks whose color is specied spectro-

photometrically as the primary standard. This

revision was published as D1544-63 and descri-

bes the scale used in the Gardner-Delta

Comparator (Catalog #CL-6750).

At the present time, both the liquid and glass

standards meet the requirements of ASTM, DIN,

ISO and other specications. The choice of

instrument is principally a matter of personal

preference.

General Information

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Altana Liquid Color Standards Manual Manuale Utente Pagina 6