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Plastic packaging producer RPC has designed a marble-effect finish for its supersoft tube caps.

The RPC Zeller Plastik Zell cap offers a finish that the company says helps create a positive consumer experience.

Using special masterbatches, the marble effect is obtained by adding chosen colours to the cap base colour during the injection moulding process.

Due to their different Melt Flow Index, the colours of the masterbatch melt time-delayed, and the marbles appear.

This random distribution of additional colours creates individual patterns which give each product its own unique appeal while maintaining a recognisable design throughout the product range.

“The new colours meet brands’ needs for differentiation and personalisation,” Julia Hartwig, sales manager – personal care, said.

“The caps with marble effect are all different and can be designed according to the colours of the printed tube – up to seven colours can be mixed in this way.”

In 1980, RPC Zeller Plastik Zell was the first manufacturer to launch a hinged tube closure (HTC). Today, it offers a broad range of designs available in multiple orifices.

RPC is a global design and engineering company specialising in polymer conversion in packaging and non-packaging markets, with centres of excellence worldwide and a turnover in excess of £2bn.

The RPC Group recently made its entry into the Australian market through its acquisition of Synergy Packaging.

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