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Updated: May 4, 2025
The muriatic acid of commerce has usually a yellowish tinge, but when chemically pure it is colorless. The former is commonly contaminated with sulphurous acid, sulphuric acid, chlorine, iron, and sometimes with arsenic. Muriatic acid, from the fact of the presence of the chlorine, is used in the Daguerreotype process for dissolving gold, and in combination with various accelerators.
The where's the interestin' point for you just now." I had seen Kysh drive before, and I thought I knew the Octopod, but that afternoon he and she were exalted beyond my knowledge. He improvised on the keys the snapping levers and quivering accelerators marvellous variations, so that our progress was sometimes a fugue and sometimes a barn-dance, varied on open greens by the weaving of fairy rings.
Accelerators of public opinion, undoubtedly hired by the Krupp firm, were hard at work. These Annexationists were opposed by the more reasonable men who signed a petition against the annexation of Belgium.
"I have found the most certain method to be as follows: Coat the Daguerreotype plate as usual, except use less of the accelerators, the proportion of iodine coating being greater, of course the time of exposure in the camera will be lengthened. Mercurialize it at about a temperature requiring to develop the image, from six to eight minutes, at least.
It is also employed in some of the more sensitive accelerators. Remarks on the Accelerating substances Used in the Daguerreotype. I have now arrived at a point in this work, where the eye of the Daguerreotype public will intently search for something new.
A solution of sufficient strength can be made by moistening or just covering the iodine with water. Chloride of Iodine as an Accelerator. This is probably one of the best accelerators that can be used for coating the plate for taking views; it works too slow, however, to meet the wants of the operating room, yet its use was formerly, for a long time, adhered to by some of our best professors.
There is a class of accelerators called sensitives, claiming to work in from three to ten seconds, which, however, will be found very little, if any, more sensitive than this. We frequently work it with the ordinary coating in twelve and fifteen seconds. The manner in which the sensitives are worked is by coating very light.
Coating the Plate. For this purpose our mechanics and artists have provided a simple apparatus called a coating-box, which is so arranged as to be perfectly tight, retaining the vapor of the iodine or accelerators, and at the same time allowing, by means of a slide, the exposure of the plate to these vapors. They can readily be obtained by application to any dealer, all of whom can furnish them.
The solution of chlorate of potash is made by diluting, one part of a saturated solution of the salt with ten parts of water. The use of the chlorate is simply as a solvent of iodine. Fats as Accelerators. The use of fats, oils, or greasy substances, has been one of the most emphatic prohibitions about the Daguerreotype plate.
This liquid is now used by many, and is very good for taking views. Lime Water Quick. This mixture is more used at present than all the other liquids ever introduced. It produced the most uniform results, giving the fine soft tone so characteristic in pictures produces from accelerators containing chlorine.
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