Toothpastes are thought to have been around since 5000 B.C. Modern-day toothpastes were developed in the early 1800s. Some of the first ingredients used were chalk, soap and even charcoal. Today, some toothpastes include colorings, flavorings and sweeteners. The main purposes of toothpastes are to help fight cavities, freshen breath and whiten teeth. Toothpastes today often contain trace amounts of chemicals that can be toxic if ingested.
Silica and Limestone
1. Minerals such as silica and limestone are found in toothpaste and provide the coarseness that scrubs the teeth clean.
2. The coarse scrubbing action of toothpaste can come from aluminum oxide and other phosphate minerals.
3. Titanium dioxide, which is made from the minerals ilmenite, rutile and anatase, are present in toothpaste. This gives the toothpaste its white pigment.
4. Sparkles in toothpaste are made possible by the presence of mica, which is found in rocks.
5. Fluoride found in toothpaste is derived from the mineral fluorite. It is used to help reduce cavities.
Read more: What Minerals Are in Toothpaste? | eHow.com [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]