Ok I have an antique lab manual for processing autochromes from 1920. This is an overview of the instructions.

A test batch of first developer is as follows

Metol 1 gram
Sodium Sulphite dry 50grams
Hydroquinone 8grams
Sodium Carbonate dry 35grams
Potasium Bromide 5 grams
Potassium Thiocynate 9 grams
Water to make 1000cc

the developer temperature times are as follows

65F - 5 minutes
72F - 4 minutes
75F - 3 minutes

In small tank development agitation should be 5 seconds ever 30 seconds.


STEP TWO
Wash film in running water for 2 minutes. (water MUST be tempered to match the developer temperature)

STEP THREE

BLEACH BATH

water to make 1000cc
Potasium Bichromate 5grams
Sulphuric Acid 98% 10cc

(Mix above chemicals slowly in order given)

Bleach time is 4minutes tempered to the same as previous baths.

NOTE:bleaching must be done with constant agitation and after the first 2 minutes the following two can be done in white light by inspection.
After Bleaching the plates image should be clearly visible with no traces of black silver left and the emulsion should have a creamy white appearance.

STEP FOUR

Wash in running water for 4 minutes. tempered to same as previous baths

STEP FIVE

THE REVERSAL

Sodium Hydrosulphite 10grams
Sodium Bisulphite 14 grams
water to make 1000cc

The time for this bath is 1 minute.

STEP SIX

FIX USING HARDNER

STEP 7 wash for 15 minutes.

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So anyway if u have autochrome and they were somehow magically preserved in mint useable condition thats the forumla for making small volumes of chemistry
for autochrome lab test conditions. The formula autochrome accredited processing labs of the day used was identical the amounts were just increased.

Hope that helps.