Core material and interlining
If the core material is attached to the back of the leather, it can make the leather have tension and improve the strength of the leather; if it is laid on the bottom, it can fix the shape, so you can choose the place to use the core material according to the purpose. Because tannin leather is very hard, core materials are rarely used, usually with chrome-tanned leather. Most of the core material is glued, as long as the rubber paper is peeled off, it can be used, so it is very convenient. In addition, the core material is also used as a reinforcing material for mounting metal parts.
The interlining can be made of leather or cloth, and which material to choose will vary depending on the leather used in the work or bag. In addition, there are many kinds of installation methods, and you can skillfully and flexibly use a variety of different methods. Additional interlining can greatly enhance the level of the work, but also improve the practicality of the work.
Core material
Here to introduce the main core materials, in addition to the core materials introduced here, there are also a variety of core materials that are not introduced, so they can be used flexibly with the use. Depending on the type or thickness of the core material used, the finished work will also greatly change the style, so please compare it with the leather used as much as possible, and then choose the core material to use.
Glue slices
Core material used as a reinforcing material for thin or soft leather. There are 0.3mm thick sheets and 0.6mm thick sheets, which can be used flexibly according to the purpose and the style of the work.
Then the core
Without losing the texture of the material, the soft leather can show a rich feeling and tension. There are 0.3mm thick sheets and 0.5mm thick sheets.
bontex hard liners
There are thin sheets of 0.4 mm thick and thick sheets of 0.75 mm thick, and if you want to show a sense of tightness in your work, you can use a 1.3 mm thick extra thickness as the bottom core of the leather bag.
vilene paper lining
It is often used as a core material to increase the strength of works such as belts or flat ropes. There are 0.4mm thick sheets and 0.6mm thick sheets.
Cow bed
As the name suggests, it is the leather of the bed surface with only cowhide. It is usually used as the core of a belt or tote bag, but also as a core when making three-dimensional works.
On the gum sponge
The core material used when you want to make the soft part more fluffy. The thickness of the gummed sponge is 3mm, while the non-glued sponge has different thicknesses of 2mm, 3mm and 5mm.
Pef insulating cotton
The lightweight and elastic core material has the effect of giving the leather elasticity and tension. The thickness is only 2mm.
Interlining
Interlinings are available in different types depending on the application. If the leather is used as a lining to be applied directly, it is usually used to thin the leather used or use caramel pig skin; while the cloth interlining is basically stitched in the opening part, and can be combined with the same shape as the bag. The style of the work will change depending on the type of interlining used or the color of the interlining, and I hope that everyone can make good use of the interlining.
Caramel pork skin
Because the surface will take on a caramel color, it is called caramel pork skin. Because it is tanned with tannins, it is very hard and is usually used as a lining of tanning leather.
Caramel soft pork skin
Pork skin with a soft feeling. Usually used as a leather bag interlining, its unique pattern can show a sense of quality.
Sheep silver skin
Because 0.3mm is very thin, it can be used as a lining skin for various works, and it can also be dyed.
Synthetic skin
It is divided into rubberized and un-glued, which is a synthetic leather made of resin. There are also types that resemble the sensation of caramel pork skin.
Lining leather
It can be used as a lining, and light leather such as caramel pork skin after the leather used in the skin is thinned. With the addition of lining, the surface of the leather can be strained, and if used on the back, it can also reduce the roughness of the bed surface. The full paste method and the serving method have their own advantages and disadvantages, so please do understand the advantages and disadvantages of these two methods, and then choose which method to use according to your preferences. The leather used as a lining leather is about 0.5mm to 1.0mm thick, and the size is about one circle larger than the surface leather. Basically, it is bent and closed at the same time, so that there is a slight difference between the surface and the size of the leather. So don't cut before fitting, and then make a formal cut after fitting.
Full sticker method
This is the method of using a joint to close the back side completely. This is the basic way of putting the skin on the skin, so that it is not easy to deform when switching; but on the contrary, the middle part is prone to wrinkles.
The leather is coated with a joint as a whole and then snugly fitted to the lining.
The leather used for lining is cut to a formal size after it is fitted, so prepare a circle of leather that is larger than the surface leather. When attaching a large area of leather, in order to make the joint cleaner, use a sprayer to wet the bed surface first. A thin layer of white glue is applied to the surface of the leather bed, and a layer of white glue is also applied to the bed surface of the lining. If you do not wet the bed first, when you apply white glue to the lining skin, the white glue of the surface leather that you apply first will dry out. Lay the surface leather underneath and then attach the lining to it. When it is fitted to about one-third, lift the surface leather up. Bend the leather while holding up the surface and snuggling it together. If it is too curved, when opened, the surface of the leather will appear a lot of wrinkles, so bend about 90 degrees. In order not to let the lining float up, press the lining as a whole, so that the surface leather and the lining fit together. In the photo, the lining skin is closed by using the bending method, and it can be found that the lining is almost in a 90-degree state.
Use the rollers so that the lining and surface leather fit together tightly. The center part is not easy to roll because the rollers are not easy to roll, so a wooden trimmer is used to make the two skins fit together. Use the edges of the table to cut off the extra lining so that the surface leather and lining can be the same size. If the bending method is performed, the width of the lining skin opening direction will be shorter than the surface leather.
Floating method
This is the method of not attaching the middle part to the skin. When opened, the middle part will float up, but the advantage is that wrinkles are not easy to occur, and the switch is relatively easy.
After deciding on the floating part, the method of lamination is not applied to that part.
When using the floating method, the lining skin is also cut to a formal size after it is fitted, so the lining should be prepared with leather that is slightly larger than the surface leather. After deciding which part not to fit, draw a line, mark the surface leather and the lining skin in the part that does not fit, and draw the part that fits with the surface leather. Use a sprayer to wet the bed, taking care not to spray too much water. Apply white glue, with the drawn line, do not apply white glue to the central part, and do not apply white glue to the lining part. Match the lines of the fitting part drawn in the front to fit the lining leather and the surface leather together. Stick to one side first, and the other side should be bent and fitted at the same time, and the position of the central part should be aligned. The difference between using the float method and the full paste method is that it is important to align the position of each section. After the lining and surface leather are fitted together, in order not to fall off, use your hands to hold it slightly and maintain this state for the time being. Because leather has the power to bend, if the fit is not done accurately, it will fall off. Once the lining is stable, the rollers allow the lining and surface leather to fit snugly together. The central part is pressed with a wooden trimmer and the exposed lining skin is cut off using the edge of the table. In the photo is the finished float surface leather.