Engraved Portrait

The portrait of the late Encik Yusof bin Ishak dominates the front of the Portrait Series notes. The fine lines are hand-engraved and printed in intaglio ink causing it to be difficult to reproduce.

Portrait Watermark

A three-dimensional multi-tone portrait watermark of the late Encik Yusof bin Ishak with areas in varying tones of dark and light can be seen when viewed against transmitted light.

Intaglio Prints

Intaglio prints are portions that are raised.There is widespread use of this intaglio printing on the Singapore Arms, the engraved Portrait, the word SINGAPORE and other areas offer good overall tactility. The prints are finely done so that tiny details are clearly defined. The intaglio printing of the denomination number helps the blind identify the notes.  

Lithographic Prints

The lithographic process prints the background on both sides of the notes. The smooth, rainbowed and anti-photographic background makes camera counterfeiting difficult and photographic separation virtually impossible.

Highlight Watermark

This monotone watermark is located below the Portrait watermark on the front of the note. It corresponds with the Braille pattern at the top right-hand corner of each denomination. Its extra thin area makes it appear clear and distinct when the note is held against light. 

Asymmetrical Serial Numbers (Vertical & Horizontal)

The asymmetrical serial numbering style has progressively larger digits in adjacent positions, which glows under ultraviolet light. One is printed horizontally while the other is printed vertically. 

Kinegram

The Kinegram appears as an octagonal foil on the front of the notes. It contains an image of the denomination number, which moves as the note is tilted. Viewing at another angle, one can also see the logo of BCCS transforming into the letters "BCCS". The background of the Kinegram is composed of shapes representing electron orbitals which change from bright to dark as the notes are rotated. This background shimmers in an array of colors when rotated. These features are unique properties to the Kinegram and cannot be replicated.

Lift Twin

Two distinctively different and latent images bearing the BCCS logo and the Singapore Lion symbol become visible alternately when the note is tilted at various angles. The Lift Twin also glows brightly under violet light.

Micro-Printing

The text 'Board of Commissioners of Currency, Singapore' is in micro-letters above the four official languages of the word SINGAPORE on the front of the note. It can only be seen with the aid of a magnifying glass.  

Fluorescent Ink

The fluorescent pigment on the serial numbers and the seal on the front of the notes glow brightly under ultra-violet light. This feature also appears on some parts of the designs on the front and back of the note.

Anti-Colour Copying Line Structures

These line structures appear at the right of the front design and on the areas below and above the Portrait watermark on the back of the note. Hidden distortions will appear at these areas when the note is colour-copied.

Perfect Registration

The Singapore Lion symbol appearing near the watermark is printed simultaneously with the same image on the front and back of the note. When held against transmitted light, the Singapore Lion symbol on the front registers perfectly with the image on the back.

Security Thread

The windowed machine-readable thread is interwoven in the paper vertically down the face of the note. The thread is visible continuously when viewed through transmitted light and it shows a series of text featuring the denomination numeral of the note as well as the word SINGAPORE in the four official languages. Holographic images of the Singapore Lion symbol of the MAS (Monetary Authority of Singapore) logo can also be seen on the silver-colored thread when the viewing angle is varied.

Invisible Feature

This feature, in the form of the denomination numeral of the note, is present on the front of the note. It is invisible under ordinary lighting condition but glows brightly under ultra-violet light.

Invisible Fluorescent Fibres

Fibres, which are invisible to the unaided eye, are incorporated on both sides of the note surface. The fibres, which cannot be seen in ordinary light, will glow under ultra-violet light.