Pretzels are dipped in a water/base solution. You can use baking powder but it does not work nearly as well as the real deal which is sodium hydroxide. If purchasing sodium hydroxide I would ensure to get food grade and only use what a recipe calls for. Natrumlauge is the German word for sodium hydroxide. You can dip rolls into it and make pretzel rolls or laugebrotchen as they are called in German. Cheers!
why are pretzles brown
Yeast makes the raw dough rise before cooking. In pretzels it does the same job. That's what makes them puffy.
tanning
Peanut butter is brown because the main ingredients are brown. Then there's a process called oxidization - same that makes an apple slice turn brown in air - that makes it a bit browner.
bottles
Formerly that was the case - but now they are mostly involved in the design process rather than manufacturing.
Manufacturing is the making of goods. General Electric makes electrical products where Ford makes cars. Toshiba makes electronics such as computers and phones.
manufacturing trade
Manufacturing
A business that actually makes things.
The Brown Widow spider makes a brown, spilt nest.
A manufacturing plant that only makes expensive handbags is an example of production of luxury products.
Iron sulfide