What a carb cap does is create a chamber with restricted airflow for your concentrates to vaporize within. Most carb caps have a single hole which helps to create suction within the chamber, and this in turn produces a vortex that helps cool down both the air and vapor trapped inside.
Like nails, carb caps can be made of either titanium, ceramic, glass or quartz. The type you choose depends on personal preference since they all function the same, and you will learn as you experiment that despite your first few tries- you will in fact get the timing right.
The exact history of rolling papers is clouded in the smoke of time, but many legends point to Spain as their country of origin. Christopher Columbus returned from his first voyage to the Americas with tales to tell and tobacco to smoke. Tobacco cigars caught on quickly with the Spanish aristocracy. The peasants, not wanting to miss out, would wrap the dregs of these cigar butts in newspaper and attempt to smoke the very last tendrils of tobacco. Newspaper was of course hard on the health, and so rolling papers were invented in the paper making capital, Alcoy.
When it comes to concentrates, how you take the hit is just as important as the quality of the oils. So why is that? Before smoking technology started to become more advanced, one would think it is completely fine to heat a nail red hot and hit it right away. This method is still used with many smokers that have not done their research. The truth is the lower the temperature of the nail, the smoother the hit and more flavorful the hit is. Now the real question is, how do you get the perfect temperature and hit when smoking oil? Low temperature dabbing is the most effective with a carb cap. These caps can be titanium, quartz, ceramic, or glass. They have a small hole on the side for air flow and fits over a domeless nail. It works the same as placing a lid over a hot pot of water on the stove; it locks in the heat. This way the nail stays that temperature and all the concentrate is vaporized.