In the previous article, we used RK's KPP gravure printingInk sampling machineIntegrate with FLX100 flexographic ink sampling machineCoverage/layer thicknessandClarity/speedA stable window was reached during the sample stage.

But if the sample exceeds the "eye line", it is still far from enough, and more importantly, it needs the endorsement of data: color and luster determine the bottom line of visual consistency; Wear resistance and scratching are related to transportation, stacking, and barcode readability. This closed loop is precisely created byKonica MinoltaCM-26dGandSutherland 2000Each fulfilling their respective duties.

When making samples, 'similar color' does not necessarily mean 'standard'.Konica Minolta CM-26dGIt is a portable d/8 ° integrating sphere spectrophotometer with a built-in 60 ° gloss sensor; It can provide both in one operationColor difference (Δ E) and gloss (GU)Clearly state "whether they are consistent" using two sets of data, especially suitable for printing and packaging scenarios with strict appearance requirements for films, coatings, paper, etc.

Experiments have shown that CM-26dG performs color and gloss measurements on the same platform, with a single color measurement of about 0.7 seconds (SCI or SCE) and a color+gloss measurement of about 1 second, significantly improving the detection efficiency of batch samples; Moreover, the 60 ° gloss sensor meets the geometric requirements of ISO, and the color data and appearance data are synchronized at the same point, which is more reproducible than "measuring twice with two instruments".

Specifically regarding the process, after the sample is completed, we suggest following the steps outlinedSame lighting/observation conditions(such as D65/10 °)+Same measurement geometry(SCI/SCE) Establish your internal judgment criteria:

· ΔEUsed to determine whether the color difference has entered the "customer acceptance zone";

·Gloss (GU)Reflecting the difference between the mirror finish of the coating and visual brightness, it can explain the subjective disagreement of "looking bright/dull".

The design of CM-26DG is based on thisComplete two tasks at onceReduce human and device switching errors, ensuring that the same conclusion can be reproduced next time.

After achieving visual consistency, the durability of the 'second eye' needs to be considered. Logistics handling, stacking friction, and shelf scanning all magnify and reveal the ink layer and coating on the surface.

Sutherland 2000Ink Friction TesterThe significance lies in making the most common "friction damage" in the real world into reproducible experimental actions using constant loads, specified reciprocating times, and optional dry/wet conditions.

ASTM D5264 is a standard practice method developed based on Sutherland equipment, suitable for evaluating scratches/fading/smudging of printed materials such as labels, color boxes, corrugated cardboard, etc; TAPPI T830 also uses a similar approach to evaluate the dry/wet friction resistance and surface strength of printed surfaces, which is commonly used in the industry as an input or factory judgment for ink/coating wear resistance.

From the perspective of equipment, Sutherland 2000 is a motor-driven, weighted, and fixed arc reciprocating anti friction testing machine that can work in different scenarios such as dry friction, wet friction, and pollution transfer; Combined with standardized gaskets/receptor paper and counters, the testing process is simple, intuitive, and traceable. This type of experiment is particularly suitable for "barcode smudging", "exposing the bottom after stacking", and "rubbing against each other after transportation" The controversy over... is transformed into comparable data or rating assessment with evidence.

In practice, based on the sampling results of RK gravure and flexible board in the previous period, we suggest integrating the determined models, mesh rollers, and speed/drying settings into the data loop of this period:

1. Color first, grind later:First, use CM-26DG to perform positional measurements at key points on the sample to confirm the consistency of Δ E/gloss

2. Wear resistance test:According to the actual circulation risk of the product, choose dry/wet rubbing and reciprocating times, and if necessary, add barcode readability review

3. Record and retest:For the critical batch of samples, retest the color difference/gloss the next day to observe if there is any appearance drift caused by back adhesion/reflux

4. Conclusion expression:Translate 'subjectively good-looking' into 'Δ E value', 'GU interval', 'abrasion resistance level', and use it as the language for release

whenConsistent color/lusterandWear resistance meets the standardWhen the same frame appears, the sample is no longer a beautiful photo, but a conclusion that can be safely released.

Welcome to consult Zhanlin

Create your scene

Put it on the device and run it once

If you are dealing with issues such as color fluctuations, barcode scratches, and unstable metallic feel in bulk goods, please feel free to contact us or bring the samples to Zhanlin Instrument——

We can arrange CM-26dG color/gloss measurement and Sutherland 2000 abrasion resistance demonstration for you, and turn the seemingly good samples into practical onesWrite clearly, measure accurately, and explain clearlyThe conclusion is