I allude to that of washing the collodion negative after developing, previously to fixing with the hyposulphite of soda; but, probably, the reasons I urge may have some weight.
I may add, that in any case the pictures should be much overdone before immersion, as the liquid exerts a rapid bleaching action on them; and when the liquid becomes saturated, a few crystals of fresh hyposulphite will renew its action.
I imagine the pyrogallic acid to possess a reducing influence on the salts of silver employed; but this effect is only produced by its combination with the hyposulphite of soda and chloride of silver.
The image will thus be gradually brought out, and may be fixed with hyposulphite of soda.
Instead of bromide of potassium, a solution of hyposulphite of soda, as before directed, may be used with equal advantage.
But the most certain material to be used is the hyposulphiteof soda.
When the picture has been dried, wash it quickly over with a soft brush dipped in a warm solution of hyposulphite of soda, and then wash it for some time in distilled water, in order that all the hyposulphite may be removed.
Having previously washed the drawing in a little lukewarm water, which of itself removes a large portion of the muriate of silver which is to be got rid of, it should be dipped once or twice in the hyposulphite solution.
Porcelain pans or dishes, for applying the hyposulphite of soda and washing after the imagine is fixed, something in form like fig.
Dip it into warm water for a few minutes, and put it into the hyposulphite of soda bath--an ounce to a quart of water--from which it is finally removed and placed in a large vessel of pure water for several hours.
It may be interesting to our photographic friends to know that cyanide of potassium is capable of replacing hyposulphite of soda in all collodion processes.
The picture may be fixed by the hyposulphite of soda, which alone, I believe, can be fully depended on for fixing argentic photographs.
I have got a good black perfectly like that of an engraving, by the nitrate of uranic oxide, developed by ammonio-nitrate of silver (or plain nitrate) and fixed by plain hyposulphite without any coloring bath.
Observe the amount of a sodic hyposulphite solution (5.
It is then poured into a large quantity of hot water containing three parts of hyposulphite of sodium, boiled and filtered.
The experiment (A) with the amount of hyposulphite used up for the blank distilled water shows the amount of hyposulphite equivalent to 20 septems or .
Chloride of silver is dissolved in a solution of hyposulphite of soda, and the solution made into a paste with levigated burnt hartshorn or bone dust; this is next dried, and powdered.
Hyposulphite of sodium crystallises in four-sided prisms, which, in the dry state, are unalterable in the air; it is freely soluble in water.
Decompose hyposulphite by waste nitro-sulphuric acid from manufacture of gun-cotton for collodion.
Pale greenish-yellow; insoluble in water and in liquor of ammonia; soluble in a solution of hyposulphite of soda.
Take of-- Hyposulphiteof soda, in crystals 280 grains.
From recently precipitated chloride of silver by dissolving it in a solution of either hyposulphite of sodium or of cyanide of potassium.
It is necessary to perform this standardising of hyposulphite with every series of experiment on account of its tendency to change.
To remove the unaltered silver a solution of hyposulphite of soda in water is used.
This fixing solution is made of eight ounces of the hyposulphite and forty of water.
The advantage of the alum bath is that the hyposulphite is destroyed into harmless products, and the gelatine is rendered insoluble by it.
The old hyposulphite baths used in printing should be placed in another tub.
Herschel was the first to point out that hyposulphite of soda would dissolve chloride of silver, and subsequently it has been found that it dissolves almost every organic salt of silver.
For a fixing bath is used-- Sodium hyposulphite 2 ounces Water 20 " The washing after fixing is more rapid than with albumenized paper.
When we add hyposulphite to a salt of silver, such as the chloride, we get one of two reactions, the formation of a nearly insoluble double hyposulphite of soda and silver, or a readily soluble one.
It frequently occurs that though sodium hyposulphite cannot be detected in the washing water, it may be present in the paper itself.
Should prints refuse to tone, either the gold has been exhausted, or else a trace of sodium hyposulphite has been carried into the toning bath by the fingers or other means.
Experience has shown that one ounce of solid hyposulphite will fix with safety three sheets of paper, so that an idea can be formed of how much must be used for a day's printing.
Native ultramarine consists of silica, alumina, sulphur, and soda; its colouring matter seeming to be due to hyposulphite of soda and sulphide of sodium.
In dyeing, for instance, the solutions of bichromate of potash and hyposulphite of soda would be worth a trial, the liquids of course being kept separate, and the brown washed with cold water.
Or a wash of 1 dram sugar of lead or 2 drams hyposulphite of soda in a quart of water may be freely applied.
Internally counteract costiveness and remove intestinal irritants by the same means as in eczema, and follow this with one-half ounce doses daily of hyposulphite of soda, and one-half ounce doses of gentian.
If this seems to be losing its effect after a week, change for mercurial ointment or a solution of sulphid of potassium, or of hyposulphite of soda, 3 drams to the quart of water.
So far this experiment shows that iodine is soluble in hyposulphite of soda.
After a few minutes the iodine is no longer held in solution, and the liquid will resume the dark sherry color it had before adding the hyposulphite of soda.
I did not determine how much washyposulphite and how much sulphate.
There may also be produced some hyposulphite of mercury, which, under the same influence, would be transformed into sulphuret of mercury and sulphate of potash.
An extra quantity of potash facilitates the deoxidizement of the chromic acid by the formation of hyposulphite and sulphuret of potash, both of which have a strong attraction for oxygen.
The more concentrated the sulphuric acid is, the more blue hyposulphite is formed.
I will exemplify this once more by using the whole spectrum and placing this cell, which contains hyposulphite of soda in solution in water, in front of the slit.
Hydrochloric acid was then added; as the fine particles of sulphur were formed, the disk of light assumed a yellow tint, and as the decomposition of the hyposulphite progressed, it assumed an orange and finally a deep red tint.
The image of a circular diaphragm placed in front of the electric light was thrown on the screen in imitation of the sun, and a cell containing hyposulphite of soda placed in the beam.
The “fixing solution” is made by dissolving half an ounce of hyposulphite of soda in five or six ounces of water.
What is the rationale of the chemical action upon the hyposulphite of soda?
Twenty-four grammes of hyposulphite of sodium in a liter of water.
When the process seems to have gone far enough, the picture is thrown into a bath containing hyposulphiteof soda, which dissolves the superfluous, unstable compounds, and rapidly clears up the lighter portions of the picture.
Vast quantities of the hyposulphite of soda, which, we shall see, plays an important part in the process of preparing the negative plate and finishing the positive print, are also demanded.
When it is well washed, we plunge it into this bath of hyposulphite of soda, which removes all the iodide of silver, leaving only the dark metal impregnating the film.
In order to make things as easy as possible for them I once more rearranged the loads that afternoon, abandoning six hundred rifle cartridges, several tins of hyposulphite of soda, other chemicals, all the developing trays, etc.
One man opened a tin of powdered hyposulphite and, believing it to be powdered sugar, proceeded to pour it down his throat.
Hyposulphite of soda, 225 grains; and water, 5 oz.
The enlargement should be washed in plenty of running water from the tap to arrest development, and then fixed in:-- Hyposulphite of soda 4 ounces.
To this solution add Hyposulphite of soda 15 ounces and shake until dissolved, when it is ready for use.
In other cases they consist of hyposulphite of lead, dissolved in an excess of hyposulphite of soda.
To the drinking water add one ounce of Hyposulphite of Soda twice a day.
If due to inflammation of the intestines, give Hyposulphite of Soda, two ounces; Potassi Iodide, one dram, two or three times a day in their drinking water.
Feed laxative foods as hot bran mashes, steamed rolled oats and vegetables, supplying the animal with pure water to drink, to which add two drams of Hyposulphite of Soda, two or three times a day.
Also mix Hyposulphite of Soda in the proportion of two to four grains to every fowl in their drinking water twice daily.
Also place Potassium Iodide one dram, Hyposulphite of Soda one ounce in the drinking water two or three times a day.
Place in gelatin capsule and give with capsule gun: Hyposulphite of Soda, sixteen ounces; Nitrate of Potassi, four ounces.
When an animal has abscesses it is well to give the following blood purifiers or internal antiseptics: Hyposulphite of Soda, eight ounces; Potassi Iodide, one ounce.
Hyposulphite of Soda in ounce doses should be given two or three times a day in their drinking water.
In their drinking water add the following: Hyposulphite of Soda, sixteen ounces; Potassium Iodide, two ounces.
In the drinking water add Hyposulphite of Soda in the proportion of one to two grains to each fowl (one-half grain to chicks).
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "hyposulphite" in a variety of sentences. We hope that you will now be able to make sentences using this word.
