Siemens 
D12-52 Operating And Installation Instruction page 42

Dyeing
Bleaching
42
Only use dyes that are environmentally compatible
and suitable for use in washing machines.
Attention
Washing in subsequent wash cycles may become
discoloured.
q Apply dyes according to the manufacturer's
instructions.
After dyeing:
q Pour approx. ½ measuring beaker of detergent
into dispenser II.
q Without any laundry in the drum, allow the
Cottons/Coloureds with temperature of 90 C
programme to run through.
q Wipe out the rubber seal.
Attention
Bleaches may contain sulphur or chlorine which can
corrode components of the washer dryer. Do not
bleach washing in the washer dryer.