What is the properties of detergent powder?

Answer 1

They are usually written at the back of the container....and if u want me to answer for all..it's quite lengthy if u can read it:

Parameters

(1) Suds height in inches. I added detergent to a quart yogurt container containing 16 oz of cold (~70F) tap water and stirred slowly until dissolved. Then I covered the container and shook vigorously for 10 seconds. Next, I let it stand for 15 seconds. Then I measured the height of the suds with a ruler.

(2) pH (This is off because our tap water has a pH=8.0-8.3, but a lot of U.S. water is alkaline, so this may be fairly typical.)

(3) TDS (total dissolved solids) less the TDS our tap water (~113 ppm). The scale is off, giving measurements that are about 50% too low, but it is useful for comparing relative TDS values.

(4) Weight/60 ml (1/4 cup) for powdered detergents only.

...............................suds..........pH.......TDS.......weight/60 ml

...............................height(1).....(2)......(3).......(4)

Liquid detergents

Tide HE (l)........................0".........7.7.....64ppm

Wisk HE (l)......................3/4".........9.4.....83ppm

Ecos (l).......................1 1/4".........8.2.....33ppm

Tide Free (l)..................1 1/4".........8.2.....77ppm

Cheer Free (l).................1 1/2".........8.1.....58ppm

Arm & Hammer Free (l)..........1 3/4".........9.1.....34ppm

Ultra Plus Free (l)............1 3/4".........8.9.....57ppm

Wisk Free (l)..................2".............8.4.....63ppm

All Free and Clear (l).........2 1/2".........9.7.....79ppm

Purex Free Clear Classic (l)...2 1/2".........9.8....129ppm

Powdered detergents

Tide HE (p)......................1/4"........10.9....900ppm...1 1/4 oz

Dalli (p)......................1"............10.8...1372ppm...1 3/8 oz

Ultra Plus Free (p)............1"............10.6...1347ppm...1 7/8 oz

Persil (p).....................1 1/4"........10.4....622ppm...1 oz

Megaperls (p)..................1 1/2".........8.9....200ppm...1 5/8 oz

Sensitiv (p)...................1 1/2"........10.3....497ppm...1 5/8 oz

Perwoll (p)....................1 1/2".........8.3....958ppm.....3/4 oz

A & H FabriCare Free (p).......1 1/2"........10.7...1467ppm...1 3/8 oz

Tide Free (p)..................2 1/4"........10.6....723ppm...1 1/4 oz

for comparison

A & H Washing Soda (p)............ 0"........10.8...1829ppm...2 1/8 oz

Electrosol Dual Action DW det(p)...0"........10.6...1306ppm...1 3/4 oz

With our hard water, 85F water temperature, 10 pound wash load, and 18 minute wash time in the FriGEmore, I could use 3 fluid ounces of any of the liquids or 2 oz (by weight) of the powders without excessive sudsing if the load I was washing had been very well rinsed previously. For loads that had some detergent residue, sudsing was a problem for those detergents with a suds height of 1 3/4 to 2" or more. It will be interesting to see which of these will work in the Miele with its longer wash time and hotter cycles.

Another note of interest is the Tide HE powder and liquid. Both were unique in having a very rapid reduction in suds height after shaking. These suds heights were after 10 seconds of shaking and 15 seconds of rest. The Tide HE liquid suds fell slightly faster than the powder. Both had no suds after about 30 seconds. The Wisk HE liquid had a little bit of this property. I didn't notice much of this effect with the other detergents.