Category Archives: Packaging Design

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ISTA 1A Test for the Corrugated Shipping Cartons

ISTA 1A test is widely used to assured the carton box quality during the transportation. In DePrintedBox, we have a series of test to make sure of the box quality. However, the clients can also apply a ISTA 1A test for the printed box to be 100% sure the package is perfect for their needs. The test will be implemented by the certified institutes and be charged a certain fee to the clients.Below is a short introduction to the ISTA test.

1. What does ISTA refer to?

International Safe Transit Association (ISTA) is an organization focused on the specific concerns of transport packaging and is dedicated to develop and deliver standards packaging systems.

2. What is ISTA 1A test for the corrugated package?

ISTA 1A test is designed to make sure that the corrugated package can withstand the transport hazard. With the test properly applied, the ISTA procedure can provide the tangible benifit of

• Shortened carton development time and confidence in product launch
• Protection of products and profits with reduced damage and product loss
• Economically balanced distribution costs
• Customer satisfaction and continued business.

3. There are three sections: Overview, Testing and Report

Overview provides the general knowledge required before going into the testing laboratory and
Testing presents the specific instructions to do the testing in the laboratory and
Report indicates what data shall be recorded to submit a test report to ISTA.

4. Two systems of weights and measures are presented in ISTA test procedures.

They are the English system (Inch-Pound) and the international system SI (Metric). Inch-Pound units are shown first with Metric units in brackets, except in some tables where they are shown separately.

• Either system may be used as the unit of measure (standard units), but
• The standard units chosen shall be used consistently throughout the procedure.
• Units are converted to two significant figures and
• Not exact equivalents.

For more information, please refer to the official doc from ISTA

http://www.ista.org/forms/1Aoverview.pdf

Shanghai DE Printed Box is a China medium-sized custom paper box manufacturer and packaging solution provider with facilities around 100,000 square meters in total. The company exclusively specializes in the supply and export of the custom paper boxes, including the paper printed boxcorrugated printed boxcosmetic paper boxrigid paper box, cardboard gift box and custom paper bag. If you have any questions about the custom paper box, or would like us to give you a price quote, please do not hesitate to contact us by giving us an email.

Paper Grammage(GSM), PT and Thickness Comparison and Conversion Table

Paperboard Thickness and Grammage Conversion Table

单铜,双铜,白卡,灰底白板纸张克重gsm, 厚度和pt对照转换表格

In China, the thickness of the paperboard is measured in milimeters, while point is used in USA, which is abbreviated to pt. The fomulas below can be used for the conversion of the 2 units.

1 inch =25.4mm = 1000 pt. 

1 pt = 0.0254mm

For example, 60pt=60*0.0254mm=1.524mm. The 60pt chipboard in USA refers to the 1.5mm greyboard in China, which is very ideal for the small rigid paper boxes. When you need a strong rigid box, 80pt chipboard can be used, which is 2mm thick greyboard in China.

– 标准厚度(mm)         – 标准厚度(mm)  
10PT 0.254                    11PT 0.279  
12PT 0.305                    13PT 0.330  
14 PT 0.356                   15PT 0.381  
16 PT 0.406                   17PT 0.432  
18 PT 0.456                   20 PT 0.508  

Below is the paper details used at DE Printed Box.

白卡纸,单铜(SBS C1S) 双铜纸(SBS C2S) 哑粉纸,铜版纸(Art Paper) 双胶纸(Woodfree Paper)
GSM mm GSM mm GSM mm GSM mm
210 0.27 80 0.06 105 0.09-0.1 80 0.095
230 0.3-0.31 105 0.08 128 0.12-0.13 100 0.11
250 0.33 128 0.1 157 0.16 120 0.14
300 0.4-0.41 157 0.12 200 0.19-0.2 150 0.17
350 0.47-0.48 200 0.17 250 0.25 180 0.2
400 0.55 210 0.21 300 0.31 200 0.23
230 0.25 250 0.29
250 0.265 300 0.33
300 0.35 350 0.4
350 0.41 400 0.47
400 0.465
SBS C1S(白卡)PT/GSM Comparison Table SBS C2S(双铜)PT/GSM Comparison Table
PT 标准克重GSM 使用克重 PT 标准克重GSM 使用克重
7PT 161g 7PT 182g
8PT 174g 190g 8PT 195g
10PT 199g 210g 9PT 225g 230g
11PT 225g 230g 10PT 234g 230g
12PT 236g 250g 12PT 272g 300g
14PT 265g 300g 14PT 306g 300g
15PT 280g 300g 16PT 340g 350g
16PT 296g 300g 18PT 358g 350g
18PT 324g 350g 20PT 420g 400g
20PT 345g 350g 24PT 230G白卡对裱
22PT 379g 400g 30PT 300G白卡对裱
24PT 407g 400g
26PT 435g 450g
灰底白板(Duplex Board with Grey Back) 白底白板(Duplex Board with White Back)
GSM mm GSM mm
250 0.32 300 0.37-0.38
300 0.37 350 0.44-0.45
350 0.44-0.45 400 0.5-0.51
400 0.49 450 0.57-0.58

Note: 1. The duplex board with grey back is also referred to as the while lined chipboard with greyback, clay coated new back(CCNB).

2. The duplex board with white back is also referred to as the white lined chipboard with white back.

3. The wouldfree paper is also referred to as the offset paper

4. The SBS C1S, C2S is also referred to ivory board or art paper in China. C1S means that the paper is coated on only one side of the paperboard. C2S means that both sides of the paperboard are coated. Ivory paperboard in China usually refers to the SBS C1S. Such papers are used to make the luxury printed paper boxes and cosmetic boxes.

5. The art paper is also called coated paper.

Shanghai DE Printed Box is a China medium-sized custom paper box manufacturer and packaging solution provider with facilities around 100,000 square meters in total. The company exclusively specializes in the supply and export of the custom paper boxes, including the paper printed boxcorrugated printed boxcosmetic paper boxrigid paper box, cardboard gift box and custom paper bag. If you have any questions about the custom paper box, or would like us to give you a price quote, please do not hesitate to contact us by giving us an email.

Difference Between Spot Color and CMYK Color

1. What is spot color?

In offset printing, a color that is produced by a ready-mixed ink is called spot color. There are several spot color system created. The Pantone Matching System(PMS) created by the Pantone Inc. is the most dominant and most widely used.

2. What is process color?

Process color is also refered to as CMYK color, four color. To have a better understanding of the process color, the term of CMYK color model and halftone needs be explained first.

2.1 CMYK Color Model

In contrast to the RGB color model, CMYK color model is a subtractive color model, used in the color printing. CMYK refers to the inks cyan, magenta, yellow and key(black).

CMYK_print

The overprinting of the CMYK color can reproduces other colors. Cyan and yellow produce green, cyan and magenta produce a purplish blue, yellow and magenta produce red.

2.2 Halftone

When we create dots small enough and dense enough on a paper, and see them far away enough, the dots blend together into continuous tone. The is our optical illusion. Therefore, halftone is a technique, using half tone dots to create the continuous tone imagery.

Left: halftone dot pattern with increasing size downwards, Right: how the human eye would see this, when viewed from a sufficient distance.

Left: halftone dot pattern with increasing size downwards, Right: how the human eye would see this, when viewed from a sufficient distance

With CMYK printing,  halftoning (also called screening) allows for less than full saturation of the primary colors; tiny dots of each primary color are printed in a pattern small enough that human beings perceive a solid color. Magenta printed with a 20% halftone, for example, produces a pink color, because the eye perceives the tiny magenta dots on the large white paper as lighter and less saturated than the color of pure magenta ink.

Without halftoning, the three primary process colors could be printed only as solid blocks of color, and therefore could produce only seven colors: the three primaries themselves, plus three secondary colors produced by layering two of the primaries: cyan and yellow produce green, cyan and magenta produce a purplish blue, yellow and magenta produce red (these subtractive secondary colors correspond roughly to the additive primary colors) plus layering all three of them resulting in black. With halftoning, a full continuous range of colors can be produced.

As for now, you may have known what process color is. If no, check the animation below.

3.How to tell if a color is spot color or process color?

A 15x magnifying glass, or much powerful, is perfect to tell the difference between a spot color and a process color.

 spot-vs-process-color

Shanghai DE Printed Box is a China medium-sized custom paper box manufacturer and packaging solution provider with facilities around 100,000 square meters in total. The company exclusively specializes in the supply and export of the custom paper boxes, including the paper printed boxcorrugated printed boxcosmetic paper boxrigid paper box, cardboard gift box and custom paper bag. If you have any questions about the custom paper box, or would like us to give you a price quote, please do not hesitate to contact us by giving us an email.