Adjustable-temperature deep fryers also work very well but are much pricier. And of course you can always use the wok for frying. Whichever method you prefer, don't crowd the cooker with too many of the spring rolls at once. If making egg rolls dip each roll in the egg wash before placing into the fryer. You will probably need to find an Asian specialty market or order them on-line, but they are far superior to the standard supermarket brands.
Thick soy is a darker, thicker version of regular soy and contains molasses.
It is less salty than soy and is frequently used in oriental cooking for making sauces.