Наверно полистирол (ПС) методом вакуумной формовки.
{"assets_hash":"a8b26fa7f6e768b07a72c8c9aadb9422","page_data":{"users":{"420144b43df9550077792493":{"_id":"420144b43df9550077792493","hid":5916,"name":"bumerang","nick":"bumerang","avatar_id":null,"css":""},"494691e33df955007777468b":{"_id":"494691e33df955007777468b","hid":41905,"name":"Юрий05","nick":"Юрий05","avatar_id":null,"css":""},"4ccc664c3df955007775a952":{"_id":"4ccc664c3df955007775a952","hid":74116,"name":"Andrew294","nick":"Andrew294","avatar_id":null,"css":""}},"settings":{"can_see_ip":false,"can_report_abuse":false,"can_see_hellbanned":false,"forum_can_view":true,"forum_can_reply":false,"forum_edit_max_time":30,"forum_can_close_topic":false,"forum_show_ignored":false,"forum_mod_can_delete_topics":false,"forum_mod_can_hard_delete_topics":false,"forum_mod_can_see_hard_deleted_topics":false,"forum_mod_can_edit_posts":false,"forum_mod_can_pin_topic":false,"forum_mod_can_edit_titles":false,"forum_mod_can_close_topic":false,"can_vote":false,"forum_mod_can_add_infractions":false,"forum_topic_title_min_length":10,"forum_reply_old_post_threshold":30,"votes_add_max_time":168,"forum_show_post_interval":7,"can_see_deleted_users":false},"section":{"_id":"61c9a54c3df9550077bb5114","hid":40,"title":"Композиты и технологии применения","parent":"61c9a54c3df9550077bb50e4","description":"Стекло, уголь, смолы, матрицы, технологии работы.","is_category":false,"is_votable":true,"is_writable":true,"cache":{"topic_count":1134,"post_count":16771,"last_post":"66f166f36371a12da9394368","last_topic":"566868133df9550077ea7461","last_topic_hid":437394,"last_topic_title":"Матрица","last_ts":"2024-09-23T13:02:43.813Z","last_user":"460221f83df9550077785786"}},"topic":{"_id":"4cd1efa53df955007764bed8","hid":209258,"title":"Из чего и как это делается","views_count":1811,"last_post_counter":3,"cache":{"post_count":3,"first_post":"4cd1efa53df955007764c6e0","first_ts":"2010-11-03T23:26:29.000Z","first_user":"494691e33df955007777468b","last_post":"4cd2b6243df955007764c6e4","last_post_hid":3,"last_ts":"2010-11-04T13:33:24.000Z","last_user":"4ccc664c3df955007775a952"},"st":1,"section":"61c9a54c3df9550077bb5114"},"subscription":null,"pagination":{"total":3,"per_page":25,"chunk_offset":0},"posts_list_before_post":["paginator","datediff"]},"locale":"en-US","user_id":"000000000000000000000000","user_hid":0,"user_name":"","user_nick":"","user_avatar":null,"is_member":false,"settings":{"can_access_acp":false,"can_use_dialogs":false,"hide_heavy_content":false},"unread_dialogs":false,"footer":{"rules":{"to":"common.rules"},"contacts":{"to":"rco-nodeca.contacts"}},"navbar":{"tracker":{"to":"users.tracker","autoselect":false,"priority":10},"forum":{"to":"forum.index"},"blogs":{"to":"blogs.index"},"clubs":{"to":"clubs.index"},"market":{"to":"market.index.buy"}},"recaptcha":{"public_key":"6LcyTs0dAAAAADW_1wxPfl0IHuXxBG7vMSSX26Z4"},"layout":"common.layout"}