metoln.

Brit.

/ˈmɛtɒl/, U.S.

/ˈmɛˌtɔl/,

/ˈmɛˌtɑl/

Origin: A borrowing from German. Etymon: German Metol.

Etymology: < German Metol (1893: see quot. 1893¹), probably < the initial and terminal elements of the chemical name methylparamidometacresol.

Photography.

The sulphate of 4-methylaminophenol, (CH₃NH)C₆H₄OH.H₂SO₄, a soluble white crystalline solid that is used chiefly as a photographic developer.

ΚΠ

1893 Photogr. Ann. 90 Metol, according to the statement of the maker (Hauff, of Feuerbach), is the sulphate of methylparamidometacresol. It is a white powder, soluble in water.

1893 Photogr. Ann. 92 Metol solutions harden gelatine.

1902 Encycl. Brit. XXXI. 687/1 Metol Developer.

1923 Nature 7 Apr. 481/2 It is well known that metol, which is one of the most popular of photographic developers, suffers from the grave disadvantage that if it is allowed to come into contact with the hands it may cause persistent and exceedingly irritable sores.

1977 J. Hedgecoe Photographer's Handbk. 39 Developing agents (usually metol, phenidone and hydroquinone) in the solution donate electrons to the development centers formed by the latent image.

1993 PSA Jrnl. 59 31 Another formula may use a larger ratio of metol to produce softer results.

This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).

单词	metol
释义	metoln. Brit. /ˈmɛtɒl/, U.S. /ˈmɛˌtɔl/, /ˈmɛˌtɑl/ Origin: A borrowing from German. Etymon: German Metol. Etymology: < German Metol (1893: see quot. 1893¹), probably < the initial and terminal elements of the chemical name methylparamidometacresol. Photography. The sulphate of 4-methylaminophenol, (CH₃NH)C₆H₄OH.H₂SO₄, a soluble white crystalline solid that is used chiefly as a photographic developer. ΚΠ 1893 Photogr. Ann. 90 Metol, according to the statement of the maker (Hauff, of Feuerbach), is the sulphate of methylparamidometacresol. It is a white powder, soluble in water. 1893 Photogr. Ann. 92 Metol solutions harden gelatine. 1902 Encycl. Brit. XXXI. 687/1 Metol Developer. 1923 Nature 7 Apr. 481/2 It is well known that metol, which is one of the most popular of photographic developers, suffers from the grave disadvantage that if it is allowed to come into contact with the hands it may cause persistent and exceedingly irritable sores. 1977 J. Hedgecoe Photographer's Handbk. 39 Developing agents (usually metol, phenidone and hydroquinone) in the solution donate electrons to the development centers formed by the latent image. 1993 PSA Jrnl. 59 31 Another formula may use a larger ratio of metol to produce softer results. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). < n.1893
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