Three Roujiamo

"Hehe." Luo Chong chuckled twice at Qu Bing's impatient look, then turned to Zhan Ying beside him. "Why don't you tell them how this photographic paper is made? After all, you made it."

Zhan Ying covered her mouth and giggled as well. Qu Bing and Ao Fei looked at her in disbelief.

"Don't look at me. This was what the Chieftain told me to do. Mix egg whites with salt and stir them together. After letting the mixture settle, spread the salted egg liquid evenly over the paper and leave it to dry. I don't know what happens after that."

"After that, I gave it straight to you. Once the paper coated with egg whites is treated with light-sensitive Silver Nitrate, it becomes the kind of photographic paper you're using now," Luo Chong added from the side.

"T-that's it? Just salted eggs? That can make photographic paper? Chieftain, what kind of principle is this?"

Qu Bing stammered for a long while. Luo Chong's outrageous method had stunned him speechless. No matter how hard he thought about it, he couldn't understand how adding a little egg and White Salt could turn ordinary paper into photographic paper capable of developing images.

"Actually, this works on the same principle as the photographic plates I told you about. The gelatin I had you spread over the glass plates is actually a kind of highly purified collagen. The purpose of coating the glass with gelatin is to form a layer on its surface capable of carrying an image. After light-sensitive treatment with Silver Nitrate, it can be used to take negatives.

"The photographic paper I made with egg whites and salt serves the same purpose: creating a layer of albumin halide coating on the paper's surface. Although it isn't the same as gelatin, they're essentially