① Color-Shifting Ink

Depending on the angle, the color of the Braille Code in the lower left corner on the obverse of the banknote turns from gold to green.

② Windowed Security Thread

The windowed security thread is easily seen as metallic bars under the light. When the banknote is held up to the light, the segments of the thread are connected as a bold continuous line.

③ Watermark

Holding the note up to the light, a hidden portrait of King Sejong appears in the non-image space on the left side of the obverse(and the right side of the reverse).

④ SPAS(Special Press and Soldering)

The T'aeguk, two-comma roundel, in the lower left corner of the portrait watermark on the obverse, appears as a kind of watermark even without the note being held up to the light.

⑤ Micro Lettering

Difficult to see with the naked eye, but can be discerned with magnifier. It appears as a line or dotted line when forged by color printer or color copier.

⑥ Intaglio Latent Image

Tilted, the latent character word "10000" appear in the right of the portrait.

⑦ See-Through Register

Held up to the light, the right-corner image on the observe matches the image on the reverse.

Held up to the light, the right-corner image on the observe matches the image on the reverse.

⑧ Intaglio Printing

A special method putting ink into the concave and printing as convex. The slightly raised figures can be felt.