一灯光纸的试制纸张印像纸之能在灯光下感光使用者,称为“灯光纸”,一般是在纸上涂以感光剂而成。这种纸最好是纯由纤维素组成,或含亚硫酸纸浆不多的纸张。印像纸上普通还涂有一层白色硫酸钡作为填充料,叫做“钡地纸”。这种纸密致洁白,没有细纹,我用的是一种光滑细洁的厚道林纸和一种比较平滑的图书纸。薄道林纸太软,张力不够, A light paper trial paper printing paper in the light of light users, known as the “light paper”, usually painted on the paper made of sensitizers. The paper is preferably purely composed of cellulose, or paper containing less sulfurous acid pulp. Impression paper also coated with a layer of white barium sulfate as a filler, called “barium paper.” The paper is white and dense with no fine lines. I use a smooth, clean, thick forest paper and a smoother piece of book paper. Thin forest paper is too soft, not enough tension,