The Silk Charge page on JOYMAX's website explains it well enough in my opinion. Here's the one in English for example:
Quote:
The digital currency on Silkroad Online is divided into Silk and Premium Silk.
Depending on which Silk you use, you will be limited in your item selections and gifting options.
What is Silk?
Silk is the digital currency of Silkroad Online used to purchase premium items.
With Silk, you can purchase untradeable items.
Silk Payment Methods: PayPal, Click & Buy (Euro), Click & Buy (USD), Direct Payment, Moneybookers,Credit Card,Playspan(E-Pin)
As you can see, only untradeable items can be purchased with Silk.
Quote:
What is Premium Silk?
Premium Silk is the digital currency of Silkroad Online used to purchase premium items.
There is no limit to item purchases.
(You can purchase both tradable and untradeable items.)
Premium Silk can also be gifted to other players.
(You can purchase items with Premium Silk that you receive as a gift.)
Premium Silk Payment Methods: PaybyCash, Incomm, CashU, Paysafecard, Wallie-card, E-Pin (Except Playspan)
As you can see, Premium Silk can do everything Silk can do and more. It is not limited to just tradeable items as The Invisible has stated.
The Invisible wrote:
Premium silk : Tradeable items .
Normal silk : Un-Tradeable items .
