Classifications

• • C—CHEMISTRY; METALLURGY
  • C14—SKINS; HIDES; PELTS; LEATHER
  • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
  • C14C1/00—Chemical treatment prior to tanning
  • C14C1/06—Facilitating unhairing, e.g. by painting, by liming

Definitions

• Our present invention consists in following or carrying out such a process as will enable us to make use of substances in such, a form as will not damage either the hair or the hides or skins, thus said hair when removed will retain its natural properties so that its future or subsequent treatmentis not in anyway interfered with and this we have found to be of great importance and value with respect to wool removed from the skins of sheep as well as with mohair and the like.
• the hides or skins are placed directly into the unhairing pit prior or subsequent to the placing therein of the liquor for treating same.
• Each hide or skin when placed in the pit ought to be suspended therein, by any well known means, so that the liquor in the pit may have access to all the outer surface thereof.
• the quantity of ammonia used depends on the temperature at which the unhairing is carried out and this temperature may range from about 45 degrees Centigrade down to about 10 degrees according to the result required, the higher the temperature the quicker is the result attained. As the ammonia plays no part in the actual unhairing, but preserves the hides from the actions of the putrefactive bacteria, it is obvious that the amount of said ammonia depends on the temperature of the compounded liquor, the higher the temperature the more will be the added ammonia.
• the skins may be subjected to the above treatment until they are in the desired condition for pulling or unhairing which may be from about six hours to two or three days depending on the amount of thrombase in the skin.
• a bath for removing hair from hides and skins consisting of a liquor derived from powdered sulphur, boiling water, and quieklime, boiled and diluted With Water.
• a bath for removing hair from and treating hides and skins consisting of a liquor derived from powdered sulphur, boiling water, and quicklime, boiled and admixed with water and ammonia.
• a bath for removing hair from and treating hides and skins consisting of powdered sulphur, water, quicklime, and am monia.
• a bath for removing hair from hides and skins consisting of the following ingredients in substantially the proportions named; 15 pounds of powdered sulphur, gallons of boiling water, and pounds of quicklime, the resultant liquor being added to Water in the proportion of from 1 to 10 gallons to 1000 gallons.
• a bath for removing hair from and treating hides and skins consisting of the following ingredients in substantially the proportions named; 15 pounds of powdered sulphur, 10 gallons of boiling water, and 15 pounds of quicklime, the resultant liquor being added to water in the proportion of from 1 to 10 gallons to 1000 gallons, and from 5 to 15 gallons of ammonia being added to the whole.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Cosmetics (AREA)
• Treatment And Processing Of Natural Fur Or Leather (AREA)

Priority Applications (3)

Applications Claiming Priority (3)

Publications (1)

Family

ID=89574628

Family Applications (1)

Country Status (3)

• 1924
  • 1924-09-01 GB GB20556/24A patent/GB241666A/en not_active Expired
  • 1924-11-13 US US74978124 patent/US1605988A/en not_active Expired - Lifetime
• 1925
  • 1925-09-18 FR FR603228D patent/FR603228A/fr not_active Expired

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