This project was completed during studio time at university. This architectural print was bought from America on E-bay, and depicts school building plans.
The print was in poor condition when it was received. It had been stored rolled up, and was heavily creased, did not lie flat and was quite weak. There was surface dirt, and discolouration throughout, the yellowed discolouration probably being caused by the paper being very poor quality to begin with, as well as some staining, possibly caused by damage from water. The paper had lots of small tears and losses, as well as a larger tear in the upper right region, and was heavily foxed, particularly along the edges.
The ink tested negative for fugitivity, and the pH test revealed a pH of 6.5, slightly acidic. Lignin was also tested for and detected. This was an important result to obtain as the proposal for treatment included deacidification (lignin containing papers should not be deacidified using Calcium Hydroxide).
The print was surface cleaned, and then immersion washed in a warm bath, to remove dirt and reduce discolouration and staining. The object was then mildly deacidified in a bath containing Magnesium Bicarbonate.
The stains and foxing marks were then reduced using both 1% Hydrogen Peroxide, and 0.25% Calcium Hypochlorite solutions, using a fine paintbrush, over the suction table (below). Application was repeated a number of times. The stains and foxing could only be reduced and not entirely removed, as the paper type, a chemical wood pulp, meant the bleaching agents would not penetrate very deeply into the very short paper fibres (hence the use of the suction table, to try and aid capillary action of the bleach into the fibres).
The object was then ready for lining as it was quite weak. The print was humidified, and the large tear in the upper right region was brought together and held in place with temporary splints on the recto, to prevent movement during lining. The object was then lined with 11 gsm Tengujo using the traditional technique. The Tengujo, a lighter tissue, helped retain the character of the object.
Infill repairs could then be carried out, and toned 27 gsm Tonosawa paper was adhered to the object and the lining from the recto. The presence of the lining allowed for a very minimal overlap between the object and the infill papers. The excess lining paper and repair papers were then trimmed. Below is a detail of some of the infill repairs.
The object was then encapsulated within a Melinex enclosure, containing a mountboard support behind the object.