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Count: We have sent you a verification email. To verify, just follow the link in the message. Updated: Jul 6, , IST. Despite being available in various quality and types, have you ever wondered why toilet paper is always available in white colour? If your obvious answer is that it is clean to look at before you start using, you have to know the real science behind it.
For starters, white isn't just an aesthetic choice, the white colour of toilet paper is usually achieved by bleaching the paper and this can make the paper much softer.
The bleaching process can be used to remove lignin, a polymer in wood that to some extent functions as a "glue" to hold the fibers together and makes the tree more rigid. As Dr. Hou-Min Chang of N. State University in Raleigh said, "Without lignin, a tree could only grow to about 6 ft. Besides the added softness, removing lignin also adds a significant amount of shelf-life to the paper.
For example if you've ever seen an old newspaper, you may notice that the paper starts to yellow as it ages; this yellowing is due to the presence of lignin in the newspaper. Obviously toilet paper that yellows over time, especially unevenly, isn't going to fly off the shelves. October 1, February 16, February 24, News Developments Ideas. Related posts:. Why most cruise ships and luxury yachts are white, while container ships are all kinds of colours?
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Reitelman points to the history of consumer goods like organic eggs and whole wheat bread that have made the leap from white to brown. Seventh Generation, for instance, dyes its baby diapers light brown to stand out as an eco-friendly option. Of course, color-based branding can be highly misleading. Green says customers who are willing to go past the optics will realize that less-than-white toilet paper can feel as luxurious as premium bleached varieties.
She says that a roll of brown toilet paper also serve as a reminder that micro-actions can lead to changing planet-polluting standards.
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