halation

Halation is the term used to denote the spreading of light beyond its proper place on the negative.

The first advantage, which I soon discovered, is their entire freedom from halation.

The same mixture makes an excellent backing for dry plates to prevent halation.

Nor did the disturbing influence of the glare and halation of Kimberley only affect the vision of the diamond men within the town.

As at Sannah's Post, so again at Lindley the halation of a word or two in his orders fogged the image on his retina.