The difference between 2B pencil and 3B pencil is: First, the hardness of pencil lead is different. The hardness mark of pencil lead is usually “H” for hard pencil, “B” for soft pencil, “HB” for soft and moderate pencil, and “F” for pencil with hardness between HB and H. Arrangement (from soft to hard)…
Advantages: rich level, deep and detailed drawing. Disadvantage: The picture is easy to reflect light and gray. The hardness mark of pencil lead is usually “H” for hard pencil, “B” for soft pencil, “HB” for soft and moderate pencil, and “F” for pencil with hardness between HB and H. Pencil is a kind of…
Pencils are machined as follows: Pencil board processing: 1. Unfold and cut logs, cut square and saw them into blocks. After hydrothermal treatment, they are cut into pencil boards by a board cutter. The plate is 184 mm long, 73 mm wide and 4.8-5.2 mm thick. The pencil board is softened and easy to…
Graphite pencils: According to GB/T 149-1995, according to their hardness, they are divided into 18 kinds: 6B, 5B, 4B, 3B, 2B, B, HB, F, H, 2H, 3H, 4H, 5H, 6H, 7H, 8H, 9H and 10H. Hard pencils use “H” (Hard for hard), soft pencils use “B” (Black for black), and ordinary hardness use “HB”…
First of all, there is a big difference in blackness between the two pencils. The 2B pencil has a higher blackness, and the marks drawn are relatively black, while the HB pencil has a lower blackness, and the color of the marks drawn is relatively light, which is very different. In addition, the hardness…
1. Different pens. Mark pens are usually round, Mark pens are square and have hard pens. 2. Marking pens are usually oily, and their color is not easy to fall off. Because of their single function, there are few choices of color types and less changes in the pen head. Mark pens are generally…
Oily marker pen, is not soluble in water, but in alcohol, when the pen is dry, you can use a syringe to absorb a small amount of alcohol into the marker pen, and then you can use it. Oily marker pen has strong penetration, which is usually reflected on the back of the paper. And…
Production Details： Product name： Creative small refreshing transparent pen bag Material： PVC Style： Trapezoid Specifications： 21*8.5cm Pattern： Fruits
Production Details： Product name： Cartoon pony pencil bag Material： Canvas Style： Square Specifications： 19.5*9cm Pattern： Cartoon
Production Details： Product name： Inverted trapezoidal student pen bag Material： Canvas Style： inverted trapezoid Specifications： 20x8x4cm Pattern： stripe
