Examples from the Web for hydrosulphite
The constituents of the hydrosulphite vat are hydrosulphite of soda, lime and indigo.
The hydrosulphite of soda referred to above is made in the following way: 4-1/2lb.
It may be restored to its former conditions by adding some hydrosulphite of soda.
It has many advantages over the hydrosulphite vat, as it is not nearly so much affected by changes of temperature and weather.
If added too quickly the hydrosulphite will cake, fall to the bottom and be difficult to dissolve.