Discussion on Visual Experience of UV Light and PP Fog Poster

First, the color difference after polishing

The most commonly used glazing method for posters is PP glazing and UV glazing. Now we use unglazed, PP matte finish, and UV glazing to analyze the color difference. After the glazing process, the reproduction of the printed matter has a relatively large influence, and the common point is that the concentration range of the bright portion and the intermediate tone is increased, and the condensed region of the dark portion is compressed. (Study on the Color Differences between Sun & Zhiwen Prints before and after. According to Sun Yizhi's "Study on Color Differences in Pre- and Post-printing Applications," we can find:

Varnish type
UV coating
The influence of PP matte surface light on the full-print ink density is greater than that of unglazed.
Less than unglazed.
The yellow version of the printing plate was higher than the unglazed, but the blue, magenta, and black plates were larger than the unglazed plates, but did not significantly change the reproduction concentration.
Both are smaller than unglazed, but the range of change is large.
The dot enlargement situation is larger than the unglazed from 10% to 90%. Intersections between 80% and 90% of the dots intersect unglazed dot gain curves less than unglazed.
Hue difference and non-glazing are not much different.
Better than not polished.
There is no difference between gray and unglazed.
Better than not polished.
Effectiveness is not much different from non-glazing.
Better than unglazed.
Printing ink has an increasing trend.
There is a weakening trend.
Chromatic aberration has a greater response to color patches of dots.
For color dots, the response of color patches is small.
The print contrast value of the print contrast flat screen is less than the unprinted print contrast value.
The relative printing contrast value of the flat screen is less than the unglazed printing contrast value.
The gray balance curve, regardless of color, is located on the unglazed gray balance curve.
The gray balance curve of the highlight and midtones lies above the unglazed, but in the shadow region, the curve falls below the unglazed gray balance curve.

Printing stability before and after polishing

There is a large variation in the midtones, (less stable) but there is a slowing down after the darkness (instability).

With the enlargement of outlets, there is a large variation. (more unstable)

Second, visual experience

Regarding the 50 students who had the “Unglazed posters and posters on UV light and PP matte surface light, which one gave you the best visual experience and why?” a simple survey revealed:

(a) Five of the 50 students like the unglazed poster: Because it looks more natural.

(B) 17 out of 50 students liked the UV varnish poster: because the colors look bright, there are reflective effects, brighter and more attractive attention, the poster feels more realistic, the product (pattern) looks realistic, three-dimensional, PP The color of the light on the matte surface is suppressed, so I do not like it.

(c) Of the 50 students, 28 were fond of the PP matte light poster: because the poster appeared to be more textured, comfortable, soft, natural, beautiful, advanced, delicate, non-glareous, the eyes did not feel reflective, and the visual experience was higher , posters have a sense of value. (to be continued)