Methods and equipment for removing stains from fabrics
OwnerLawnie Taylorinventor
Life of this patent
Estimating the term…
Abstract
Methodologies and equipment for using a hypochlorite solution to remove menstrual fluid, underarm perspiration or other hard-to-remove stains from soft fabric articles with reduced damage to the fabric articles when compared with popular chlorine bleaches. The soft fabric articles preferably are in white, although the present invention can also be applied to articles in other colors. In one embodiment, the weight concentration ratio of the alkali metal hydroxide over the hypochlorite salt in the hypochlorite solution is no less than 1:12.5. The hypochlorite solution may contain at least 0.2% by weight of sodium hydroxide and/or have a pH of at least 11.8.
Claims31
A method for reducing the damaging effect of a hypochlorite salt-containing solution on a soft fabric article, comprising the steps of:
- (a) modifying the solution by adding an alkali metal hydroxide to the solution, such that the weight concentration ratio of the alkali metal hydroxide over the hypochlorite salt in the modified solution is no less than 1:12.5;
- and
- (b) contacting the modified solution with a stain on the soft fabric article for at least one minute to remove the stain.
A method for reducing the damaging effect of a hypochlorite salt-containing solution on a soft fabric article, comprising the steps of:
- (a) modifying the solution by adding an alkali metal hydroxide to the solution, such that the pH of the modified solution is at least 11.8;
- and
- (b) contacting the modified solution with a stain on the soft fabric article for at least one minute to remove the stain.
A kit useful for removing a stain from a soft fabric article, said kit comprising:
- a cleaning composition which comprises an effective amount of a hypochlorite salt and an alkali metal hydroxide, the weight concentration ratio of the alkali metal hydroxide over the hypochlorite salt being no less than 1:12.5;
- and
- an instruction for removing said stain from said soft fabric article employing said cleaning composition.
A kit useful for removing a stain from a soft fabric article, said kit comprising:
- a first compartment which includes a sodium hypochlorite solution;
- a second compartment which includes a sodium hydroxide solution;
- and
- an instruction for removing said stain from said soft fabric article employing said kit.
Dependencies are inferred from the claim text.