My new AEG from 1969?

[rolls_rapide]

Biological detergents contain enzymes that break down organic stains much more readily. One of the first detergents was Procter & Gamble's Ariel in 1969. A detergent with enzymes cleans more effectively than non-bio detergents.

Euro automatics were hot & cold fill. Now they tend to be more cold fill only.

Special "Bio buttons" on the washing machine usually either cause the machine to fill with cold water and heat it slowly, or else add a prewash that is cold fill and slowly heated to 40°C, before a normal "hot & cold fill" mainwash.

Furthermore, if a housewife used non-bio soap powder most of the time, she could use a biological prewash detergent, like Biotex, in the prewash.

http://www.bio-tex.co.uk/

 

[mieledani]

As you can see in this instruction manual, biological washes include "extended soaking time between 40º and 60º" during mainwash. Water is heated slowly so the machine gets more time for heating. This programm was specially designed for difficult stains. [My English is very bad. I´m so sorry]

http://www.manualshark.org/manualshark/files/5/pdf_10544.pdf

 

[mieledani]

Many european old machines had a "bio" programm. It could be a longer mainwash, or an extra soak during prewash. Modern machines and modern detergents need to be "biological"

 

[mieledani]

"Biological wash" was also the modern word for "Long wash"

 

[mieledani]

A bio-detergent and a bio-washing machine: