Cards at least 400gsm
Edge painting, as its name explained, is a process of applying colours to the edges of cards. Edge painting can be done in any colours and even with foils! It is commonly used overseas, but rarely can you see any in Malaysia, so this is definitely something new that you can adopt for your name card design.
Edge painting has best result with thicker cards, at least 400gsm paper stocks. Otherwise the effect is minimal unless you stack all together, but you are only giving one card at a time, so people might not aware of the impact of edge painting unless it can obviously be seen on a single card.
Edge painting is also widely used on wedding invitation cards. It brings about feel of liveliness to your design.