Stain Removal and Dingy Whites Research

Objective: To assess effectiveness of stain removal and whitening power of Persil Universal when used alone and with boosters.

Items: 30 white cotton T-shirts

Stained items: White cotton T-shirt stained horizontally, equally and consistently; cut vertically in 4 similar pieces. One piece for each tested load, and one control, containing all 8 types of common stains.

Control: 1 dingy white cotton T-shirt, 1 stained white T-shirt piece

Condition of shirts: used dingy white T-shirts; all previously washed in Charlies Soap.

Washer: Samsung 448 Front Loader with Silver Care and Steam.

Water Hardness = Medium

Results:

A) Washing white cotton shirts with Persil + Cascade Complete powder+ Biz + Calgon without soaking or pre-treating is more effective than washing such items with Persil alone.

B) Washing white cotton shirts with Persil after soaking in Cascade Complete Powder for 7 hours is more effective than washing such items with Persil alone.

C) Washing white cotton shirts with Persil + Cascade Complete powder+ Biz + Calgon without soaking or pre-treating is as effective as washing white cotton shirts with Persil after soaking in Cascade Complete powder for 7 hours.

Conclusion: Washing white cotton shirts with Persil + Cascade Complete powder + Biz + Calgon without soaking or pre-treating yield a very satisfactory whitening and stain removal effect. Persil alone was not strong enough to remove stains as well as when combined with boosters, in medium water hardness, after one wash. Specifically, mustard and grape juice left very visible stain after washing with Persil alone. The grape juice stain turned brown after washing with Persil alone. None of the tested washing groups were able to remove the canola oil stain completely. In terms of time spent washing items and effectiveness of whitening, stain removal, and overall cleaning, the group where items were washed using boosters seems to be the best out of the 3 tested groups.

Legend

Cascade Complete powder = CCp

Persil Universal = PU

DATA

________________Group 1__________Group 2__________Group 3

Load____________10 T-Shirts_______10 T-Shirts________10 T-Shirts

Soak Time________7 hrs ______________-________________-

Soak Detergent_____Cp________________-_______________-

____Amount_______2 TBS_____________-_______________-

Soak Water________Tap Warm_________ -________________-

Pre-wash Deterg____Cp_____________CCp_____________CCp

____Amount_______2 TBS__________2 TBS____________2 TBS

Wash Temperature___150 F__________150 F____________150 F

Wash Detergent_____PU____________PU______________PU

____Amount________4.5 TBS_______4.5 TBS__________4.5 TBS

Boosters____________-_______________- _____________CCp = 2 TBS

_________________________________________________Biz = ½ Cup

_________________________________________________Calgon Liquid = ¼ Cup

Cycle_____________Sanitize__________Sanitize__________Sanitize

_________________Extra Rinse________Extra Rinse_______Extra Rinse

Total Time________7 h + 2h 36m_______2h 36m__________2h 36m

Results:

Suds Pre-Wash_____Very Low________Very Low_________Very Low

Suds Main Wash____Low____________Low______________Low

Suds Rinse_________None___________ None_____________None

Score (Max = 5)

1) Whitening________3.5_______________2_______________3.5

2) Overall Cleaning___4________________3.5______________4

3) Stain Removal:____4.5_______________3.7______________4.5

__- Ketchup________100%_____________100%___________100%

__- Mustard_________95%_______________90%___________95%

__- Grapr Juice______100%______________30% ___________90%

__- Canola Oil________30%______________30% ___________40%

__- Grass___________100%_____________100%___________100%

__- Crayon__________100%_____________100%____________100%

__- Black pen_________90%______________90%____________90%

__- Coke____________100% ____________100%____________100%

Total Score:___________12________________9.2______________12

(Max = 15)