Drawing method of mask

The drawing method of the mask is as follows:

(1) Draw a rectangle with an aspect ratio of 2 first.

(2) Draw a smaller rectangle on the inside of the drawn rectangle, thus drawing the edge of the mask.

(3) In the drawn shape, draw three parallel straight lines, which are the folds on the mask.

(4) Draw an arc on the right side of the drawn rectangle as shown in the figure below.

(5) Draw the same arc on the left side of the rectangle. Choose a light blue marker to color the painted mask, so that a simple mask is completed.

The earliest recorded "masked object" appeared in the 6th century BC. Persian Zoroastrianism believes that the secular atmosphere is unclean, and they usually wrap their faces with cloth in religious ceremonies. In a sense, this "mask" is a status symbol. In the stone carvings of Persian tombs, priests wear "masks".

Before masks were used in medicine, people directly saw that touching limbs or medical appliances could infect germs, but they didn't realize that droplets spread in the air could also infect germs. Although sterile surgical instruments have been used in aseptic surgery, surgeons wear surgical gowns, surgical caps and rubber gloves; However, masks are not used for protection, so that germs are often spread through droplets in the oral cavity and nasal cavity during surgery, resulting in wound infection.

Until 1895, German pathologist Ryder Wizards discovered that airborne germs can infect wounds, and he thought that saliva with germs when people spoke would also worsen wounds. Therefore, he suggested that doctors and nurses wear masks made of gauze to cover their mouth and nose during surgery.