In 1931, Manoel Vieira de Araújo, an experienced industrialist in the headwear area and a notable entrepreneur from São João da Madeira, with the aim of expanding the company, acquires the factory Portugália.

Thus, the early years of the Viarco factory were dedicated to research, application of forms, renovation of facilities and improvement of production methods, in order to develop the manufacture of existing products as well as to extend the diversity of the manufacture of material.

[2] In 1941, the factory facilities are moved from Vila do Conde, Porto to São João da Madeira, which was also the location of the headquarters of the company Vieira Araújo & Cª, Lda.

By the 1970s, the factory became a limited liability company and was renamed to "Viarco – Indústria de Lápis, Lda".

Those original goods include the "Nº 1", a soft graphite putty that allows users to shape the drawing tool according to their specific needs;[6] the "Notebook", a rigid case similar to the homonymous electronic device, but containing a graphite art set inside.