Documenting and cataloging a collection of porcelain sculptures is essential for preservation, insurance, and future reference. Here are the best methods to ensure your collection is well-organized and easily accessible:

1. Photographic Documentation: Take high-resolution photos of each sculpture from multiple angles, including close-ups of markings or signatures. Use consistent lighting and a neutral background for uniformity.

2. Detailed Descriptions: Record dimensions, weight, colors, glaze types, and any unique features. Note the artist, date of creation, and provenance if available.

3. Inventory Software: Use specialized software like Artwork Archive or Excel spreadsheets to create a searchable database. Include fields for condition reports and restoration history.

4. Physical Labels: Attach acid-free tags or labels with minimal information (e.g., inventory number) to avoid damage. Store detailed records separately.

5. Condition Reports: Regularly update the condition of each piece, noting cracks, chips, or discoloration. This is crucial for insurance and conservation purposes.

6. Digital Backups: Store all documentation in cloud-based services or external hard drives to prevent data loss.

7. Professional Appraisal: For valuable pieces, consult an expert to verify authenticity and value, adding credibility to your records.

By implementing these methods, you can ensure your porcelain sculpture collection remains well-documented, preserved, and easily referenced for generations to come.