white fabrics and Whiter than White?
Apparently the reason why white fabrics turn yellow is because they were never white in the first place, some fabrics are dyed white so you get a yellowy tinge if you wash them at high temperatures, which is why some fabrics have 40c labels on them
Hot water can strip the white dye out of the fabric leaving it a chewing gum white colour or a dingy white
if the stain says hot but the label says not
trust ariel to get it clean, even in cool water.
i could never boil wash whites at 90c, it seems a bit impractical and a strain on your electric bill, most whites will get white and clean enough on a 60 degree wash, or even a 40 degree wash
i have alot of white t-shirts with logos on and i could never boil wash them to get them whiter than white, a swish around the washer with a scoop of Daz or Ariel at 40c will do the trick.
i would have thought 60 on towels would be hot enough to get whites white enough