TNDIA-TINT VIGNETTES.
light greatly influences the shape of the vignette unless tissue paper is used, even with diffused daylight. it is, however, a fallacy to suppose that if tissue paper is placed over the negative printing may take place in the sun, for it will be found that a shadow of the opening will still be cast on the negative. If, how ever, another piece of tissue paper or a muslin frame is placed above at a short distance this becomes the source of light and the shadow vanishes. It is advisable The production of these is an old pro cess which has recently come much into favour, and consists of first vignetting the picture as has just been described, then covering the portion printed and allowing the paper to print down to any required depth by exposure to the bare light. In printing-out processes, it is not advisable to use too bright a light for tinting down. The centre portion may be shaded by means of a glass to which has been attached several pieces of tissue paper, each one about in. smaller each
way than the next ; giving an appearance when looked through of that seen in Fig. 249. This is laid over the print, which is placed face up on the glass and moved slightly during exposure. Some printers, however, merely cover up the centre portion with a duster or a tuft of wool. The effect of such vignettes is most artistic, as the attention is centred there by upon the head, and any unpleasing details near the margin may be subdued. Take, for instance, the bust of a lady when the head is to be small. The waist must show if printed plain, but by this means it is possible to give only a faint indication to it. An example of such a vignette is given in one of the full-page plates. In some cases, the first vignette may be dispensed with.