Grammage and Price Calculation of the PET Sheets

PET片材的克重和价格计算

PET sheets/films are widely used in the custom paper boxes to constitute the clear window, also referred to the clear window paper box. In this article, we will talk about how to calculate the grammage and price of the PET sheets.

The density of PET is constant,  1.38 g/cm3 (20 °C). For a piece of PET sheet measured 100cm length * 100cm width * 0.1mm thick,

PET密度:1.38 g/cm3 (20 °C)。

volume =100*100*0.1/10=100cm3 ;

10丝PET克重(0.1mm厚度): 100*1.38=138gsm;

20丝PET克重(0.2mm厚度):128*2=276gsm;

30丝PET克重(0.3mm厚度):128*3=384gsm;

Therefore, theoretically the 0.2mm thick PET sheet has the grammage 276gsm;

The cost of the PET is usually priced at RMB14,800/t.

PET吨价:14800元。

10丝PET价格:138*14800/1000000=RMB2.0;

20丝PET价格:RMB4.0;

30丝PET价格:RMB6.0;

在淘宝上,100张大度PET(带双面防尘保护膜)的含运费价格大概在750元。

In theory, the per square cost of 0.2mm thick PET sheet wold be 0.6USD.

But in practice, a lot of other fees would be involved to produce the PET sheet. In reality, the per square cost of 0.2mm PET sheet is around 1.2USD.

 

 

A Glossy Black Paper Bag Printed Inside and Out

Beside the common single sided printed paper bag, which is usually litho printed outside, Shanghai DE Printed Box also produces the custom paper bag and custom paper box printed inside and out. In this article, we will talk about a custom paper bag with the semi-gloss printing inside, which is made for the Malta Post in Malta.

custom paper bag china paper supplier

Glossy black printing outside the custom paper bag

The paper bag is a custom paper bag with the glossy black printing outside and semi-gloss red printing inside. It has the white cotton rope on the top for the easy carrying.

custom paper bag printing inside and out

Semi gloss red printing inside the custom paper bag

The paperboard used for the custom paper bag is 200gsm ivory paperboard. 250gsm, 157gsm are also very common for the printed paper bag. The printing solution is the litho offset printing and the finish is the glossy laminating outside and semi gloss vanishing inside.

Shanghai DE Printed Box is a leading China custom paper box and paper bag manufacturer, supplying various kinds of custom folding paper box, printed paper box, corrugated printed box and rigid paper box. If you have a printed paper box or bag to do, please do not hesitate to give us an email for a price quote.

Custom Lift Off Lid Rigid Paper Box With EVA Foam Insert

In this article, we will talk about a custom lift off lid rigid box with the EVA foam insert. The custom rigid paper box is made for a Slovak company, which uses the box to hold its chip products.

custom lift off lid rigid paper box

Lift off lid rigid paper box

For the custom rigid paper boxes, the EVA foam insert is an ideal type of cushioning material to provide the best protection to the valuable but delicate items inside. At one hand, the EVA foam insert has the perfect cushioning property; at the other hand, the EVA foam is easy to cut with the great precision to hold the items well inside.

custom rigid paper box with EVA foam cutout insert

Black color EVA foam cutout inside.

As you can see from the picture above, the die-cutting of the EVA foam has the excellent precision to create cutouts of various shapes. What makes this custom rigid paper box special is that  all the cutted parts are kept inside the whole EVA foam. And our client decides which one is to be removed when they get the package at hand.

lift off lid rigid paper box with EVA foam insert

Cutted parts left inside for the client to choose which one to remove.

Another important feature is that there are 2 layers for the EVA foam inserts. The upper layer is only 5mm in thickness, quite thin. The bottom layer is 12mm in thickness, much thicker than the upper foam.

custom rigid paper box with EVA foam insert.

2 layers for the EVA foam insert inside the rigid paper box

There is a very high precision requirement for the dimensions of the different parts of the box. The allowance of the distance between the top of the foam and the package edge is only 1mm and no more.

EVA foam cutout and the rigid paper box

Great precision is required for the EVA foam cutout and the rigid paper box

Another special requirement of our client is to create a cream white custom paper box with brilliant white paper color and soft touch feel. Therefore, we adopt the soft touch laminating on the special white paper stock.

Lift off lid rigid paper box

Back view of the lift off lid rigid box with the finger hole on the lid for the easy to open of the box.

Shanghai DE Printed Box is a custom paper box manufacturer and supplier, supplying all kinds of custom paper printed boxes, corrugated printed box and rigid paper boxes, folding cartons and paper bags. If you have a custom paper box or paper bag to do, please do not hesitate to contact us. We would be very glad to help you with your packaging project.