Another method which I frequently adopt is thus; albumen as above, without water, to which is added iodide of potassium forty grains; this throws down the albumen in jelly-like masses, and, when added to the collodion, not only iodizes it, but produces the same effect upon the collodion as by the formula above. Also, another method: one ounce of chloroform, to which is added one half ounce of albumen, prepared as above, iodized; this forms also a soft semi-transparent jelly, which on being added to the collodion produces perhaps the best effect of any of these preparations.
This addition of albumen also answers a far better purpose, than any that has hitherto been employed for freeing old samples of collodion from free iodine held in suspension by which they can be rendered as clear and limpid as they were when first mixed.
What I claim as my invention, and desire to secure by Letters Patent is the addition of albumen to collodion in the manner and for the purpose herein and above specified.
V. M. Griswold.
| Alfred M'Veigh, J. C. Heuley. | } | Witnesses. |
Patented July 15th, 1856.
COLORING AMBROTYPES.
To all whom it may concern:
Be it known that we, D. B. Spooner and H. B. Spooner, of Springfield, in the County of Hampden, in the State of Massachusetts, having invented new and useful improvements in coloring Ambrotype or Photographic Pictures on glass, and we do hereby declare that the following is a full and exact description thereof:—