Very interesting approach after taking the Proko figure drawing course--iterating through it many times and getting better each time. I did not expect the emphasis on the silhouette redefined repeatedly. It's not a very efficient method, compared to gesture, structure, shadow-mapping taught by Jeff Watts and Stan. But it does end up looking like a "Russian drawing".

Like you, I'm rather attached to newsprint, in particular "Richeson newprint". The tooth and tone of the paper is perfect for charcoal. I've looked for an archival paper that is identical in tooth and tone to Richeson but haven't found one yet. The closest is Strathmore 400 series but the tone of the paper is yellowish cream and not grey. I have resorted to taking high resolution photographs of drawings as a record of progress mainly, which can be printed later. Another option is to deacidify the paper using a deacidification spray like "Bookkeeper Deacidification Spray". Google that phrase. Expensive but probably goes a long way if you spray the newsprint drawing you want to keep.