{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:CDFBOE24GUMGSZAGNRWGWL7A2H","short_pith_number":"pith:CDFBOE24","canonical_record":{"source":{"id":"1807.03201","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-07-09T14:46:37Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"a5de0b93891f4161f433b6fbe6c247f4a41557286489f7cadf28b49e471828e7","abstract_canon_sha256":"4993d3f3d62fcbb875d9d0450f7d6c63f8f539fdddd5971a7f652cf6f18206df"},"schema_version":"1.0"},"canonical_sha256":"10ca17135c35186964066c6c6b2fe0d1c3daa8d1c60b17bba652bf3c7a05978b","source":{"kind":"arxiv","id":"1807.03201","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.03201","created_at":"2026-05-18T00:11:03Z"},{"alias_kind":"arxiv_version","alias_value":"1807.03201v1","created_at":"2026-05-18T00:11:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.03201","created_at":"2026-05-18T00:11:03Z"},{"alias_kind":"pith_short_12","alias_value":"CDFBOE24GUMG","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"CDFBOE24GUMGSZAG","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"CDFBOE24","created_at":"2026-05-18T12:32:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:CDFBOE24GUMGSZAGNRWGWL7A2H","target":"record","payload":{"canonical_record":{"source":{"id":"1807.03201","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-07-09T14:46:37Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"a5de0b93891f4161f433b6fbe6c247f4a41557286489f7cadf28b49e471828e7","abstract_canon_sha256":"4993d3f3d62fcbb875d9d0450f7d6c63f8f539fdddd5971a7f652cf6f18206df"},"schema_version":"1.0"},"canonical_sha256":"10ca17135c35186964066c6c6b2fe0d1c3daa8d1c60b17bba652bf3c7a05978b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:11:03.884785Z","signature_b64":"gRF2mrk0TQ3iRLvV2+03HlohCR+v2Kp4RdwSOvnoWTUisks3fQ2UswpWD7L1WxUo+bysKA6dADxD/5XI6LghCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"10ca17135c35186964066c6c6b2fe0d1c3daa8d1c60b17bba652bf3c7a05978b","last_reissued_at":"2026-05-18T00:11:03.884050Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:11:03.884050Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.03201","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:11:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sB07hH4b2f2ZGH7fJKH+/Oz7fZIqlAZDDo+72WOYwmVkR63t/BZ4IqifKj0V+r+Z5+fer8bCiwi0IwJcwr+vCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T03:23:09.346356Z"},"content_sha256":"d32cd1396bb5f7147eb2d083cb29b01112152ad2971c14eeb1479a52e35b0c4c","schema_version":"1.0","event_id":"sha256:d32cd1396bb5f7147eb2d083cb29b01112152ad2971c14eeb1479a52e35b0c4c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:CDFBOE24GUMGSZAGNRWGWL7A2H","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"3D printing of optical materials: an investigation of the microscopic properties","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.app-ph","authors_text":"(2) Department of Mechanical Engineering, 3), 32000, (3) Dipartimento di Fisica, A. Arinstein (2), A. Camposeo (1) ((1) NEST, D. Pisignano (1, E. Zussman (2), F. Cardarelli (1), Haifa, I-56127 Pisa, Israel, Istituto Nanoscienze-CNR, Italy, Italy), Largo B. Pontecorvo 3, L. Persano (1), Piazza S. Silvestro 12, S. Uttiya (1), Technion-Israel Institute of Technology, Universit\\`a di Pisa","submitted_at":"2018-07-09T14:46:37Z","abstract_excerpt":"3D printing technologies are currently enabling the fabrication of objects with complex architectures and tailored properties. In such framework, the production of 3D optical structures, which are typically based on optical transparent matrices, optionally doped with active molecular compounds and nanoparticles, is still limited by the poor uniformity of the printed structures. Both bulk inhomogeneities and surface roughness of the printed structures can negatively affect the propagation of light in 3D printed optical components. Here we investigate photopolymerization-based printing processes"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.03201","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:11:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9oXlIRmi8nuUpYaB5VD5B0FVfRm4omGia7nkx7RpmKK+sdviQ/lFA75aVQanZL+SIY8G6uEcmU+MowOxGcgHAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T03:23:09.347020Z"},"content_sha256":"56cce21842dc6698dccf0f11b8f092082079d98bc744c3c755ae45d4a4beeb48","schema_version":"1.0","event_id":"sha256:56cce21842dc6698dccf0f11b8f092082079d98bc744c3c755ae45d4a4beeb48"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CDFBOE24GUMGSZAGNRWGWL7A2H/bundle.json","state_url":"https://pith.science/pith/CDFBOE24GUMGSZAGNRWGWL7A2H/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CDFBOE24GUMGSZAGNRWGWL7A2H/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-25T03:23:09Z","links":{"resolver":"https://pith.science/pith/CDFBOE24GUMGSZAGNRWGWL7A2H","bundle":"https://pith.science/pith/CDFBOE24GUMGSZAGNRWGWL7A2H/bundle.json","state":"https://pith.science/pith/CDFBOE24GUMGSZAGNRWGWL7A2H/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CDFBOE24GUMGSZAGNRWGWL7A2H/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:CDFBOE24GUMGSZAGNRWGWL7A2H","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"4993d3f3d62fcbb875d9d0450f7d6c63f8f539fdddd5971a7f652cf6f18206df","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-07-09T14:46:37Z","title_canon_sha256":"a5de0b93891f4161f433b6fbe6c247f4a41557286489f7cadf28b49e471828e7"},"schema_version":"1.0","source":{"id":"1807.03201","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.03201","created_at":"2026-05-18T00:11:03Z"},{"alias_kind":"arxiv_version","alias_value":"1807.03201v1","created_at":"2026-05-18T00:11:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.03201","created_at":"2026-05-18T00:11:03Z"},{"alias_kind":"pith_short_12","alias_value":"CDFBOE24GUMG","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"CDFBOE24GUMGSZAG","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"CDFBOE24","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:56cce21842dc6698dccf0f11b8f092082079d98bc744c3c755ae45d4a4beeb48","target":"graph","created_at":"2026-05-18T00:11:03Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"3D printing technologies are currently enabling the fabrication of objects with complex architectures and tailored properties. In such framework, the production of 3D optical structures, which are typically based on optical transparent matrices, optionally doped with active molecular compounds and nanoparticles, is still limited by the poor uniformity of the printed structures. Both bulk inhomogeneities and surface roughness of the printed structures can negatively affect the propagation of light in 3D printed optical components. Here we investigate photopolymerization-based printing processes","authors_text":"(2) Department of Mechanical Engineering, 3), 32000, (3) Dipartimento di Fisica, A. Arinstein (2), A. Camposeo (1) ((1) NEST, D. Pisignano (1, E. Zussman (2), F. Cardarelli (1), Haifa, I-56127 Pisa, Israel, Istituto Nanoscienze-CNR, Italy, Italy), Largo B. Pontecorvo 3, L. Persano (1), Piazza S. Silvestro 12, S. Uttiya (1), Technion-Israel Institute of Technology, Universit\\`a di Pisa","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-07-09T14:46:37Z","title":"3D printing of optical materials: an investigation of the microscopic properties"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.03201","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:d32cd1396bb5f7147eb2d083cb29b01112152ad2971c14eeb1479a52e35b0c4c","target":"record","created_at":"2026-05-18T00:11:03Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"4993d3f3d62fcbb875d9d0450f7d6c63f8f539fdddd5971a7f652cf6f18206df","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-07-09T14:46:37Z","title_canon_sha256":"a5de0b93891f4161f433b6fbe6c247f4a41557286489f7cadf28b49e471828e7"},"schema_version":"1.0","source":{"id":"1807.03201","kind":"arxiv","version":1}},"canonical_sha256":"10ca17135c35186964066c6c6b2fe0d1c3daa8d1c60b17bba652bf3c7a05978b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"10ca17135c35186964066c6c6b2fe0d1c3daa8d1c60b17bba652bf3c7a05978b","first_computed_at":"2026-05-18T00:11:03.884050Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:11:03.884050Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gRF2mrk0TQ3iRLvV2+03HlohCR+v2Kp4RdwSOvnoWTUisks3fQ2UswpWD7L1WxUo+bysKA6dADxD/5XI6LghCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:11:03.884785Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.03201","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d32cd1396bb5f7147eb2d083cb29b01112152ad2971c14eeb1479a52e35b0c4c","sha256:56cce21842dc6698dccf0f11b8f092082079d98bc744c3c755ae45d4a4beeb48"],"state_sha256":"624134450299a9475c711a8b9ac350b510fc7f744814b371a4e01f256adaaeb6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cj6Csg8Arly/DWQzKcF2dbGjGEQ0BP8lVlZAVJNadlpZFGfj7KnOjlFvQuKsFq+DRnsGhePvZfS3eBwdkHKCDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T03:23:09.350411Z","bundle_sha256":"7dde8d9a02a8a7d1f8b9a6a3d2b362a9feaabb6f9731267727a987f49d500df5"}}