Difference between pages "Sgraffito" and "Siderin yellow"

Latest revision as of 08:28, 31 May 2022

Description

A yellow pigment composed of Iron chromate. Iron chromate is precipitated from a solution of a chromate salt, such as Potassium dichromate by the addition of Ferric chloride. The pure pigment is bright yellow, but some residual impurities, such as iron oxide, may result in a dull orange pigment color. Siderin yellow is compatible with all paint binders. It has also been used as a brown ceramic glaze and as a colorant in glass and enamel.

Synonyms and Related Terms

iron chromate; ferric chromate; Pigment Yellow 45; CI 77505

Risks

Human carcinogen.
Skin contact may cause allergies.
Acute ingestion may cause fatal chromium poisoning.
Chronic inhalation may cause lung cancer and respiratory irritation
Ceramic Shop: SDS

Physical and Chemical Properties

Soluble in acids. Insoluble in water, ethanol.

Composition	Fe2(CrO4)3
CAS	10294-52-7

Resources and Citations

H. Kuhn, M.Curran, "Chrome Yellow and Other Chromate Pigments", Artists Pigments, Volume 1, R. Feller (ed.), Cambridge University Press: Cambridge, 1986.

Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993

Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979

The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983

@@ Line 1: / Line 1: @@
-[[File:58.93-E5162CR-d1.jpg|thumb|Bowl with sgraffito<br>MFA# 58.93]]
 == Description ==
-A decorative technique produced by scratching the surface of a painting, pottery, or glass to reveal a different color layer underneath. Sgraffito was used during the Middle Ages on illuminated manuscripts. Sgraffito decorated pottery, or sgraffito ware, include 12th century Islamic pieces, 15th century Japanese [[celadon|celadon]] ceramics (punch'ong), and 18th century English blue class stoneware.
+A yellow pigment composed of [[iron chromate]]. Iron chromate is precipitated from a solution of a chromate salt, such as [[potassium%20dichromate|potassium dichromate]] by the addition of [[ferric%20chloride|ferric chloride]]. The pure pigment is bright yellow, but some residual impurities, such as [[ferric%20oxide|iron oxide]], may result in a dull orange pigment color. Siderin yellow is compatible with all paint binders. It has also been used as a brown ceramic glaze and as a colorant in glass and enamel.
 == Synonyms and Related Terms ==
-sgraffito ware; sgraffiato; punch'ong
+iron chromate; ferric chromate; Pigment Yellow 45; CI 77505
+== Risks ==
+* Human carcinogen.
+* Skin contact may cause allergies.
+* Acute ingestion may cause fatal chromium poisoning.
+* Chronic inhalation may cause lung cancer and respiratory irritation
+* Ceramic Shop: [https://www.theceramicshop.com/sds/IronChromate.pdf SDS]
+==Physical and Chemical Properties==
+Soluble in acids. Insoluble in water, ethanol.
+{| class="wikitable"
+|-
+! scope="row"| Composition
+| Fe2(CrO4)3
+|-
+! scope="row"| CAS
+| 10294-52-7
+|}
 ==Resources and Citations==
-* ''Encyclopedia Britannica'', http://www.britannica.com  Comment: "sgraffito." Accessed 4 Feb. 2005.
+* H. Kuhn, M.Curran, "Chrome Yellow and Other Chromate Pigments", ''Artists Pigments'', Volume 1, R. Feller (ed.), Cambridge University Press: Cambridge, 1986.
+* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993
-* Karak resources project (Islamic pottery) at http://www.vkrp.org/studies/archaeological/pottery-islamic-period/info/middle-islamic-pottery.asp
+* Michael McCann, ''Artist Beware'', Watson-Guptill Publications, New York City, 1979
-* Wikipedia: http://en.wikipedia.org/wiki/Pottery
+* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983
 [[Category:Materials database]]