The Only Complete Copy in the District
The district library sends a 1934 half-leather volume of a Hindi encyclopaedia to your conservation bench. It is the only complete copy in the district and is to be digitised in four weeks. Symptoms: the spine leather has red rot and leaves orange dust on the hands; the front board is detached with the hinge cracked; the sewing is broken in two sections so the block is loose; there is light foxing throughout; and an older repair used yellow cellophane tape on the title page and black tape across the spine.
Facilities: wheat starch paste, methyl cellulose, Japanese tissue (9 and 12 gsm), unbleached mull, linen thread, a nipping press and a small heated spatula. There is no fume extraction, no leather paring skill in the unit, and the budget covers materials only. The librarian says: "Just rebind it in new leather with a gold title so it lasts another 90 years - and trim the edges so it looks neat."
1. How would you respond to the librarian's instruction, and in what order would you carry out the work?
Read the worked answer
Refuse the rebind and the trimming, politely but in writing, and record the refusal in the treatment file. This is a unique district copy: new leather would destroy the original covering, boards, endpapers and sewing evidence, and trimming removes margins and any manuscript notes. Both are irreversible and reduce research value. The governing principles are minimum intervention, reversibility and retention of original material.
Priority order: (1) stabilise the loose block and the detached board so the volume can be handled and imaged safely; (2) deal with the tape only where it is causing damage or hiding text; (3) re-sew the broken sections and hinge the board with Japanese tissue and wheat starch paste; (4) make an archival box and set storage conditions.
Digitisation first, in the stabilised state, is quite acceptable - it reduces handling afterwards and can be done while the full treatment is planned. Red rot is a condition to consolidate and slow down, not a fault to disguise by replacement.
2. Set out a tape-removal plan for the title page and the spine, including the risks you would not take.
Read the worked answer
Test first, on a blank margin, and photograph before and after.
Title page (cellophane tape): the rubber-based adhesive has probably cross-linked and stained the paper, and the carrier may be brittle. Work from the verso with a heated spatula at 40–50 °C under silicone release paper, lifting the carrier with a micro-spatula, stopping the moment fibres lift. Remove residue with a methyl cellulose poultice or a swab of suitable solvent, with the window open and a small local fan - there is no fume extraction, so keep solvent quantities to a few millilitres and work in short sessions. Never use heat over printing inks that may offset, and never scrape dry.
Spine (black tape over red-rotted leather): mechanical removal will take the powdery leather with it. Reduce the carrier where it lifts and leave the residue rather than sacrifice the original spine. If the title page text is at risk, document the tape, interleave the page with tissue and leave it in place - an honest record beats a damaged leaf.
3. Describe the board reattachment, sewing repair and post-treatment storage, without replacing the spine leather.
Read the worked answer
Re-sew only the two broken sections, through the original holes, with linen thread of similar weight; guard the weak folds with 9 gsm Japanese tissue and do not pull the whole block down or re-round it. Reattach the board with a hinge of 12 gsm tissue pasted with wheat starch paste, worked into the inner joint and under the pastedown as far as it lifts - reversible, strong, and it needs no leather paring skill. Line the spine with unbleached mull for support.
Consolidate the red rot with a tested consolidant so the spine stops shedding, applied sparingly from the inside where possible. Keep the original spine leather; a sympathetic toned repair tissue over the worst splits is enough. Store in a drop-back box of archival board with the spine supported, at 18–22 °C and 45–55% relative humidity, UV-filtered light below 50 lux, no direct sun. For imaging, use a book cradle with adjustable supports and never a flatbed press; support both boards whenever the volume is opened.