Updated April 3, 2017. 1  Worldwide, there are over 1.86 billion monthly active Facebook users (Facebook MAUs) which is a 17 percent increase year over year. 2  There are 1.15 billion mobile daily active users (Mobile DAU) for December 2016, an increase of 23 percent year-over-year.
Total Alkalinity. The total alkalinity (TA) is a measure of how much of the alkaline substances there are in the water. In the swimming pool water, we are concerned with bicarbonate alkalinity, which should be between 80 ppm and 120 ppm.When the total alkalinity (TA) is within this range, it prevents rapid pH changes and stabilises the pH level.ote that you should only add sodium bicarbonate at the rate of 1 kg per 50,000 litres of water every 4 days. Raising the TA can therefore be quite a time-consuming, slow process. Lowering the total alkalinity is also a slow process.
Most permanent hair colours are alkaline. When an alkaline substance is applied to hair it opens up the cuticle. With hair colour this allows the mixture to penetrate to the cortex where it can react with the hairâs pigment molecules to produce a colour change. Permanent colours have a pH of around 7-8. With bleach the colour molecules are oxidised, producing the lightening effect. Bleach usually has a pH of around 8 or 9 and if used too often or mixed too strong it will cause the scales in the cuticle layer to break off which causes permanent damage.