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In this paper we present a detailed study of the intra-cluster reddeningmaterial in the young open clusters located around $l \sim 130^o$ usingcolour-excess diagrams and two-colour diagrams. The study supports theuniversality of the extinction curves for $\lambda \geq \lambda_J$, whereas forshorter wavelengths the curve depends upon the value of the $R_{cluster}$(total-to-selective absorption in the cluster region). The value of$R_{cluster}$ in the case of NGC 654, NGC 869 and NGC 884 is found to benormal, whereas the value of $R_{cluster}$ in the cluster regions NGC 1502 andIC 1805 indicates an anomalous reddening law in these regions. It is also foundthat the extinction process in the $U$ band in the case of NGC 663 seems to beless efficient, whereas in the case of NGC 869 the process is more efficient.Comment: 11 pages, 13 figures, accepted in A&

Interstellar extinction in the open clusters towards galactic longitude around 130°