| 单词 | safe light |
| 释义 | > as lemmassafe light safe light n. †(a) Mining = safety lamp n. at safety n. Compounds 3 (obsolete); (b) Photography (chiefly in form safelight) a dim, coloured light used in a darkroom, the colour being that which the plate, film, etc., being worked with is least sensitive to (typically red or amber). ΘΚΠ society > occupation and work > equipment > mining equipment > [noun] > lamp pitman candle1658 fire lamp1769 steel mill1772 safe lamp1815 safe lantern1815 safety lamp1815 safety lantern1815 safe light1816 Davy1817 lamp1839 Geordie1844 pit lamp1860 flame-lamp1888 the world > matter > light > artificial light > an artificial light > [noun] > lamp > with a protected flame > in coal mines safe lamp1815 safety lamp1815 safety lantern1815 safe light1816 Davy1817 1816 H. Davy in Philos. Trans. (Royal Soc.) 106 23 I have already had the honor of communicating to the Royal Society an account of a safe light. 1883 Year-bk. Photogr. p. xxiii (advt.) 1. A safe light for the preparation of gelatino-bromide emulsion. 2. A safe light for the coating of gelatino-bromide plates. 1905 Trans. Inst. Mining Engineers 1903–4 26 309 The Sunderland Society then applied to Sir Humphrey Davy to assist them with the problem of a safe light for use in fiery mines. 1952 Pop. Mech. Apr. 211 Photographers who frequently switch from one type of safelight filter to another will find this two-way safelight a real timesaver. 2010 Los Angeles Times (Nexis) 22 Apr. e4 Auto reversal paper was spread over a table in a darkroom with only a safelight on. < as lemmas |
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