Most Viewed

- Browns And The Cold Semi-neutral Grays Marrone Is Practically To
- Also Called Scarlet Chrome Is A Bright Chromate Of Lead Of An
- Black Chalk
- Composition Chemical Analysis Has Shown Several Of The Blues To Be
- Burnt Verdigris
- Belong The Dutch And Flemish Schools; The Sensible Which Aims At
- Less Known As English Red Prussian Red And Scarlet Ochre True
- Olive In Dark Green; Russet And Citrine In Dark Orange The
- Known Likewise As Raw Sienna Earth Terra Di Sienna &c Is A
- Root Of The Anchusa Tinctoria Commonly Known As Alkanet A Plant

Least Viewed

- Their Chief Source The Greens Consist Of Yellow Mixed With Copper
- Only That Of Extreme Light Objects Opaque It Follows That White Is To
- To Which The Various Appellations Have Been Given Of Thenard's Blue
- Thallium Orange
- Distilled Verdigris Or More Properly Refined Verdigris The Best Is
- Molybdenum Green
- Red And Blue In The Proportions Of Five Of The Former To Eight Of
- Violet De Mars Purple Ochre Or Mineral Purple Is A Dark Ochre
- Uniform Colour Thus Composed Is The Citrine Colour Of Fruit And
- Also In The Olive Foliage Of The Rose-tree Formed In The Individual

Blue Ochre

which has been improperly called Native Prussian Blue, is a native
hydrated phosphate of iron of rare occurrence, found with iron pyrites
in Cornwall, and also in North America. What Indian red is to the colour
red, and Oxford ochre to yellow, this pigment is to the colour blue,
being sober and subdued rather than brilliant. It has the body of other
ochres, more transparency, and is of considerable depth. Both in water
and oil it works well, dries readily, and does not suffer in tint with
white lead, nor change when exposed to the action of strong light, damp,
or impure air. As far as its powers extend, therefore, it is an eligible
pigment, though not generally employed nor easily procured; it may,
however, be artificially prepared. Answering to similar acid tests as
ultramarine, it is distinguished therefrom by assuming an olive-brown
hue on exposure to a red heat.





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