US1401901A - Bleaching composition - Google Patents

Description

srars PATENT FE,

EDWARD FORBES, 0F WEBSTER, MASSACHUSETTS:

BLEACHING COMPOSITION;

weasel.

No Drawing.

To all 'whom it may concern:

Be it known that I, EDWARD FORBES, a citizen of the United States, residivleg in the town of Webster, in the county of orcester and State of Massachusetts, have invented new and useful Improvements in Bleaching Composition, of which the following is a specification.

In all formula and process of bleaching fabrics, known to me, it is necessary to heat the bleaching fluid to a comparatively high temperature, thus necessitating the use of fuel to heat the fluids.

One of the objects of my invention is to provide a composition with which fabrics may be successfully bleached in cold water.

My improved formula for bleaching in cold water, is as follows: Chlorid of lime, 10 pounds, soda ash, 58% 6 pounds, and solution of 30% sodium silicate, 1.3 specific gravity 1 pound.

These ingredients are to be mixed at random with 10 gallons of water at 50 degrees F., or at any other temperature desired and convenient.

The mixture should be stirred thoroughly for at least one-half hour, perferably by means of mechanical agitation. It should then be allowed to stand for an hour or more until all un-dissolved matter has settled, leaving the solution clear. It should then be drawn off into another receiver and used as indicated.

This solution gives the desired results in the bleaching of yarn made from ordinary vegetable fibers for weaving: or it may be applied to the woven cloth as it comes from the loom.

Specification of Letters Patent. Patented Dec, 27, 1921, Application filed March 19, 1920. Serial No. 367,095. I

In applying the process to the lighter and more easily bleached cotton yarns or fabrics and the like satisfactory results can be secured with a dilution of as low as 60% of the given formula.

The described bleachingsolution may be used in the treatment of either yarn or Woven fabrics in the following manner:

It is only necessary to steep the yarn or woven fabrics in receivers or pits containmg the above described bleaching solution for a period of from 10 to 16 hours, or until the desired shade is secured. v

Owing to the fact that this solution bleaches thoroughly and satisfactorily when used at any cool or moderate temperature, there is a decided saving in the cost of the fuel that would ordinarily be' needed to raise the bleaching fluids in general use to the degree of heat needed for effective operation.

What I claim is:

1. The process of bleaching fabrics con sisting in subjecting the fabrics to the action of a solution of chlorid of lime, soda ash, solution of sodium silicate, and water at a temperature approximately 50 degrees F.

2. A composition for bleaching fabrics consisting of chlorid of lime, soda ash, so-' lution of sodium silicate.

3. A composition for bleaching fabrics consisting of chlorid of lime, 10 pounds, soda ash, 58% 6 pounds, solution of sodium silicate 1 pound, and 10 gallons of water;

' In testimony whereof I aflix my signature.

EDWARD FORBES.