304 PHOTOGRAPHIC FACTS AND FORMULAS 
1 2 3 4 5 6 
Chromic acid 5 1.4 Pays 2 1-2 2 
Potassium bromide 20 14 19.8 18 20 30 
Cupric sulphate ie 28 33 30 30 18 
1. Namias; 2. Smith; 3. Anon.; 4. Schrott; 5. Wurm-Reitmayer; 6. Duvivier. 
i Rr ae: a Ret Gi ak sg yee 10 pO Bags ged 7 
Cupric sulphate 20 12... -40 43 40 22 30 9:2 10/4 285 
Cupric bromide Pipers 51 ORS, ee ae eer ep ade a uP 
Potassium bromide 10°. 8... .40' 48. 20: 20 30 (9:2) TOE ieee 
Potassium bichromate 10 2 1 2 141 215 .8 1.2 .. 0.8 
Potash alum PP A AEH at AU Auten neat cd samt aie os Sug 
Chrome alum Ep pina ne ey RAM PEMA ORUE Fokker eens ec 2 
Sulphuric acid Ct Ray eran Bye Mate ce fete) ee O15) 0:6 Cie 
Glacial acetic acid SASS UND ese D atch] tore She etek TAO ower oe te oa 
Potassium chromate SE Re 9 TN Dae a Be estould defen Palas crevp ows ote DLS ae 
1. A. B. W.; 2. Mortimer; 3. Ermen; 4. Namias; 5. Seeman; 6. Brum de 
Canto; 7. Bendorf; 8. Weissermel; 9. Featherstone; 10. Featherstone; 11. 
Gillin; 12. Wellington & Ward. 
1 2 3 4 BK 7 8 9 10 11 
Cupric sulphate 29 28.301" 24 7.5 25°28 910 (250i aeern 
Potassium bromide 29 San) Ol 20 5 10 18 8 25 oe 
Potassium bichromate 4.6 anh ee? att (op 3 1 5 1.5 
Ammonium bichromate .. 4 Bre NO: 4 
Hydrochloric acid 0.46 0.4 0.56 1.5 1 2 1 soar Dee 1.0 
Sulphuric acid Sie We Resa hans Mies he ae 3 A 0.5° ke 
Potash alum Sic ret UR Webet) td fete So Ske soma ier eal rote sD pes Aye 
Salt ae BeAsdeelte. OY watts a, ete)? ie) he cae ea 13.5 
1. Mayer; 2. Karpinski; 3. Tolkowsky; 4. Switkowski; 5. Birmingham Phot. 
Co.; 6. Rennie; 7. Mayer; 8. Namias; 9. Sturenburg; 10. Garner; 11. Swit- 
kowski. 
The quantities of the ingredients given in the above tables 
(Mebes) are for a total volume of 1000 parts of solution. 
The dried print may be soaked either in water, or a 2% to 
5 per cent solution of sulphuric acid for about 5 minutes, and 
then washed. The surface moisture should be blotted off 
and inking proceeded with. Dilute alkaline solutions may also 
be used, about 1 per cent caustic potash, soda or ammonia, 
5 per cent of the carbonates, or 10 per cent salt or calcium 
chloride. The print should be placed face up on a sheet or 
two of wet blotting paper, supported on a sheet of glass, and 
dabbed with a linen pad. Special brushes and inks are ob- 
tainable for this process, or the ink may be applied with a 
velvet roller. The inks may be obtained in almost every 
